diff --git a/src/client/ClientDataResolver.js b/src/client/ClientDataResolver.js
index c25abc30a..ba7df252a 100644
--- a/src/client/ClientDataResolver.js
+++ b/src/client/ClientDataResolver.js
@@ -8,6 +8,7 @@ const Message = require('../structures/Message');
 const Guild = require('../structures/Guild');
 const Channel = require('../structures/Channel');
 const GuildMember = require('../structures/GuildMember');
+const Role = require('../structures/Role');
 const Emoji = require('../structures/Emoji');
 const ReactionEmoji = require('../structures/ReactionEmoji');
 const { Error, TypeError } = require('../errors');
@@ -101,6 +102,27 @@ class ClientDataResolver {
     return guild.members.get(user.id) || null;
   }
 
+  /**
+   * Data that can be resolved to a Role object. This can be:
+   * * A Role
+   * * A Snowflake
+   * @typedef {Role|Snowflake} RoleResolvable
+   */
+
+  /**
+    * Resolves a RoleResolvable to a Role object.
+    * @param {GuildResolvable} guild The guild that this role is part of
+    * @param {RoleResolvable} role The role resolvable to resolve
+    * @returns {?Role}
+    */
+  resolveRole(guild, role) {
+    if (role instanceof Role) return role;
+    guild = this.resolveGuild(guild);
+    if (!guild) return null;
+    if (typeof role === 'string') return guild.roles.get(role);
+    return null;
+  }
+
   /**
    * Data that can be resolved to give a Channel object. This can be:
    * * A Channel object
diff --git a/src/structures/Emoji.js b/src/structures/Emoji.js
index 8391ad37b..1920d6fdc 100644
--- a/src/structures/Emoji.js
+++ b/src/structures/Emoji.js
@@ -106,7 +106,7 @@ class Emoji {
    * Data for editing an emoji.
    * @typedef {Object} EmojiEditData
    * @property {string} [name] The name of the emoji
-   * @property {Collection<Snowflake, Role>|Array<Snowflake|Role>} [roles] Roles to restrict emoji to
+   * @property {Collection<Snowflake, Role>|RoleResolvable[]} [roles] Roles to restrict emoji to
    */
 
   /**
@@ -124,7 +124,7 @@ class Emoji {
     return this.client.api.guilds(this.guild.id).emojis(this.id)
       .patch({ data: {
         name: data.name,
-        roles: data.roles ? data.roles.map(r => r.id ? r.id : r) : [],
+        roles: data.roles ? data.roles.map(r => r.id ? r.id : r) : undefined,
       }, reason })
       .then(() => this);
   }
@@ -150,13 +150,18 @@ class Emoji {
 
   /**
    * Add multiple roles to the list of roles that can use this emoji.
-   * @param {Role[]} roles Roles to add
+   * @param {Collection<Snowflake, Role>|RoleResolvable[]} roles Roles to add
    * @returns {Promise<Emoji>}
    */
   addRestrictedRoles(roles) {
     const newRoles = new Collection(this.roles);
-    for (const role of roles) {
-      if (this.guild.roles.has(role.id)) newRoles.set(role.id, role);
+    for (let role of roles instanceof Collection ? roles.values() : roles) {
+      role = this.client.resolver.resolveRole(this.guild, role);
+      if (!role) {
+        return Promise.reject(new TypeError('INVALID_TYPE', 'roles',
+          'Array or Collection of Roles or Snowflakes', true));
+      }
+      newRoles.set(role.id, role);
     }
     return this.edit({ roles: newRoles });
   }
@@ -172,12 +177,17 @@ class Emoji {
 
   /**
    * Remove multiple roles from the list of roles that can use this emoji.
-   * @param {Role[]} roles Roles to remove
+   * @param {Collection<Snowflake, Role>|RoleResolvable[]} roles Roles to remove
    * @returns {Promise<Emoji>}
    */
   removeRestrictedRoles(roles) {
     const newRoles = new Collection(this.roles);
-    for (const role of roles) {
+    for (let role of roles instanceof Collection ? roles.values() : roles) {
+      role = this.client.resolver.resolveRole(this.guild, role);
+      if (!role) {
+        return Promise.reject(new TypeError('INVALID_TYPE', 'roles',
+          'Array or Collection of Roles or Snowflakes', true));
+      }
       if (newRoles.has(role.id)) newRoles.delete(role.id);
     }
     return this.edit({ roles: newRoles });
@@ -206,12 +216,14 @@ class Emoji {
         other.id === this.id &&
         other.name === this.name &&
         other.managed === this.managed &&
-        other.requiresColons === this.requiresColons
+        other.requiresColons === this.requiresColons &&
+        other._roles === this._roles
       );
     } else {
       return (
         other.id === this.id &&
-        other.name === this.name
+        other.name === this.name &&
+        other._roles === this._roles
       );
     }
   }
diff --git a/src/structures/Guild.js b/src/structures/Guild.js
index 7f1d38258..ff7f5d5bd 100644
--- a/src/structures/Guild.js
+++ b/src/structures/Guild.js
@@ -508,7 +508,7 @@ class Guild {
    * @param {string} options.accessToken An OAuth2 access token for the user with the `guilds.join` scope granted to the
    * bot's application
    * @param {string} [options.nick] Nickname to give the member (requires `MANAGE_NICKNAMES`)
-   * @param {Collection<Snowflake, Role>|Role[]|Snowflake[]} [options.roles] Roles to add to the member
+   * @param {Collection<Snowflake, Role>|RoleResolvable[]} [options.roles] Roles to add to the member
    * (requires `MANAGE_ROLES`)
    * @param {boolean} [options.mute] Whether the member should be muted (requires `MUTE_MEMBERS`)
    * @param {boolean} [options.deaf] Whether the member should be deafened (requires `DEAFEN_MEMBERS`)
@@ -518,9 +518,14 @@ class Guild {
     if (this.members.has(user.id)) return Promise.resolve(this.members.get(user.id));
     options.access_token = options.accessToken;
     if (options.roles) {
-      const roles = options.roles;
-      if (roles instanceof Collection || (roles instanceof Array && roles[0] instanceof Role)) {
-        options.roles = roles.map(role => role.id);
+      const roles = [];
+      for (let role of options.roles instanceof Collection ? options.roles.values() : options.roles) {
+        role = this.client.resolver.resolveRole(this, role);
+        if (!role) {
+          return Promise.reject(new TypeError('INVALID_TYPE', 'options.roles',
+            'Array or Collection of Roles or Snowflakes', true));
+        }
+        roles.push(role.id);
       }
     }
     return this.client.api.guilds(this.id).members(user.id).put({ data: options })
@@ -898,12 +903,21 @@ class Guild {
     if (!this.client.user.bot) this.client.syncGuilds([this]);
   }
 
+  /**
+   * Can be used to overwrite permissions when creating a channel.
+   * @typedef {Object} ChannelCreationOverwrites
+   * @property {PermissionResolveable[]|number} [allow] The permissions to allow
+   * @property {PermissionResolveable[]|number} [deny] The permissions to deny
+   * @property {RoleResolveable|UserResolvable} id ID of the group or member this overwrite is for
+   */
+
   /**
    * Creates a new channel in the guild.
    * @param {string} name The name of the new channel
    * @param {string} type The type of the new channel, either `text` or `voice`
-   * @param {Object} options Options
-   * @param {Array<PermissionOverwrites|Object>} [options.overwrites] Permission overwrites to apply to the new channel
+   * @param {Object} [options={}] Options
+   * @param {Array<PermissionOverwrites|ChannelCreationOverwrites>} [options.overwrites] Permission overwrites
+   * to apply to the new channel
    * @param {string} [options.reason] Reason for creating this channel
    * @returns {Promise<TextChannel|VoiceChannel>}
    * @example
@@ -914,13 +928,30 @@ class Guild {
    */
   createChannel(name, type, { overwrites, reason } = {}) {
     if (overwrites instanceof Collection || overwrites instanceof Array) {
-      overwrites = overwrites.map(overwrite => ({
-        allow: overwrite.allow || overwrite._allowed,
-        deny: overwrite.deny || overwrite._denied,
-        type: overwrite.type,
-        id: overwrite.id,
-      }));
+      overwrites = overwrites.map(overwrite => {
+        let allow = overwrite.allow || overwrite._allowed;
+        let deny = overwrite.deny || overwrite._denied;
+        if (allow instanceof Array) allow = Permissions.resolve(allow);
+        if (deny instanceof Array) deny = Permissions.resolve(deny);
+
+        const role = this.client.resolver.resolveRole(this, overwrite.id);
+        if (role) {
+          overwrite.id = role.id;
+          overwrite.type = 'role';
+        } else {
+          overwrite.id = this.client.resolver.resolveUserID(overwrite.id);
+          overwrite.type = 'member';
+        }
+
+        return {
+          allow,
+          deny,
+          type: overwrite.type,
+          id: overwrite.id,
+        };
+      });
     }
+
     return this.client.api.guilds(this.id).channels.post({
       data: {
         name, type, permission_overwrites: overwrites,
@@ -1005,7 +1036,7 @@ class Guild {
    * @param {BufferResolvable|Base64Resolvable} attachment The image for the emoji
    * @param {string} name The name for the emoji
    * @param {Object} [options] Options
-   * @param {Collection<Snowflake, Role>|Role[]} [options.roles] Roles to limit the emoji to
+   * @param {Collection<Snowflake, Role>|RoleResolvable[]} [options.roles] Roles to limit the emoji to
    * @param {string} [options.reason] Reason for creating the emoji
    * @returns {Promise<Emoji>} The created emoji
    * @example
@@ -1022,16 +1053,27 @@ class Guild {
   createEmoji(attachment, name, { roles, reason } = {}) {
     if (typeof attachment === 'string' && attachment.startsWith('data:')) {
       const data = { image: attachment, name };
-      if (roles) data.roles = roles.map(r => r.id ? r.id : r);
+      if (roles) {
+        data.roles = [];
+        for (let role of roles instanceof Collection ? roles.values() : roles) {
+          role = this.client.resolver.resolveRole(this, role);
+          if (!role) {
+            return Promise.reject(new TypeError('INVALID_TYPE', 'options.roles',
+              'Array or Collection of Roles or Snowflakes', true));
+          }
+          data.roles.push(role.id);
+        }
+      }
+
       return this.client.api.guilds(this.id).emojis.post({ data, reason })
         .then(emoji => this.client.actions.GuildEmojiCreate.handle(this, emoji).emoji);
-    } else {
-      return this.client.resolver.resolveBuffer(attachment)
-        .then(data => {
-          const dataURI = this.client.resolver.resolveBase64(data);
-          return this.createEmoji(dataURI, name, roles);
-        });
     }
+
+    return this.client.resolver.resolveBuffer(attachment)
+      .then(data => {
+        const dataURI = this.client.resolver.resolveBase64(data);
+        return this.createEmoji(dataURI, name, { roles, reason });
+      });
   }
 
   /**
diff --git a/src/structures/GuildMember.js b/src/structures/GuildMember.js
index f6a10cbe9..b91930e51 100644
--- a/src/structures/GuildMember.js
+++ b/src/structures/GuildMember.js
@@ -324,7 +324,7 @@ class GuildMember {
    * The data for editing a guild member.
    * @typedef {Object} GuildMemberEditData
    * @property {string} [nick] The nickname to set for the member
-   * @property {Collection<Snowflake, Role>|Role[]|Snowflake[]} [roles] The roles or role IDs to apply
+   * @property {Collection<Snowflake, Role>|RoleResolvable[]} [roles] The roles or role IDs to apply
    * @property {boolean} [mute] Whether or not the member should be muted
    * @property {boolean} [deaf] Whether or not the member should be deafened
    * @property {ChannelResolvable} [channel] Channel to move member to (if they are connected to voice)
@@ -384,7 +384,7 @@ class GuildMember {
 
   /**
    * Sets the roles applied to the member.
-   * @param {Collection<Snowflake, Role>|Role[]|Snowflake[]} roles The roles or role IDs to apply
+   * @param {Collection<Snowflake, Role>|RoleResolvable[]} roles The roles or role IDs to apply
    * @param {string} [reason] Reason for applying the roles
    * @returns {Promise<GuildMember>}
    */
@@ -394,12 +394,12 @@ class GuildMember {
 
   /**
    * Adds a single role to the member.
-   * @param {Role|Snowflake} role The role or ID of the role to add
+   * @param {RoleResolvable} role The role or ID of the role to add
    * @param {string} [reason] Reason for adding the role
    * @returns {Promise<GuildMember>}
    */
   addRole(role, reason) {
-    if (!(role instanceof Role)) role = this.guild.roles.get(role);
+    role = this.client.resolver.resolveRole(this.guild, role);
     if (!role) return Promise.reject(new TypeError('INVALID_TYPE', 'role', 'Role nor a Snowflake'));
     if (this._roles.includes(role.id)) return Promise.resolve(this);
     return this.client.api.guilds(this.guild.id).members(this.user.id).roles(role.id)
@@ -409,30 +409,33 @@ class GuildMember {
 
   /**
    * Adds multiple roles to the member.
-   * @param {Collection<Snowflake, Role>|Role[]|Snowflake[]} roles The roles or role IDs to add
+   * @param {Collection<Snowflake, Role>|RoleResolvable[]} roles The roles or role IDs to add
    * @param {string} [reason] Reason for adding the roles
    * @returns {Promise<GuildMember>}
    */
   addRoles(roles, reason) {
-    let allRoles;
-    if (roles instanceof Collection) {
-      allRoles = this._roles.slice();
-      for (const role of roles.values()) allRoles.push(role.id ? role.id : role);
-    } else {
-      allRoles = this._roles.concat(roles.map(r => r.id ? r.id : r));
+    let allRoles = this._roles.slice();
+    for (let role of roles instanceof Collection ? roles.values() : roles) {
+      role = this.client.resolver.resolveRole(this.guild, role);
+      if (!role) {
+        return Promise.reject(new TypeError('INVALID_TYPE', 'roles',
+          'Array or Collection of Roles or Snowflakes', true));
+      }
+      allRoles.push(role.id);
     }
     return this.edit({ roles: allRoles }, reason);
   }
 
   /**
    * Removes a single role from the member.
-   * @param {Role|Snowflake} role The role or ID of the role to remove
+   * @param {RoleResolvable} role The role or ID of the role to remove
    * @param {string} [reason] Reason for removing the role
    * @returns {Promise<GuildMember>}
    */
   removeRole(role, reason) {
-    if (!(role instanceof Role)) role = this.guild.roles.get(role);
+    role = this.client.resolver.resolveRole(this.guild, role);
     if (!role) return Promise.reject(new TypeError('INVALID_TYPE', 'role', 'Role nor a Snowflake'));
+    if (!this._roles.includes(role.id)) return Promise.resolve(this);
     return this.client.api.guilds(this.guild.id).members(this.user.id).roles(role.id)
       .delete({ reason })
       .then(() => this);
@@ -440,22 +443,20 @@ class GuildMember {
 
   /**
    * Removes multiple roles from the member.
-   * @param {Collection<Snowflake, Role>|Role[]|Snowflake[]} roles The roles or role IDs to remove
+   * @param {Collection<Snowflake, Role>|RoleResolvable[]} roles The roles or role IDs to remove
    * @param {string} [reason] Reason for removing the roles
    * @returns {Promise<GuildMember>}
    */
   removeRoles(roles, reason) {
     const allRoles = this._roles.slice();
-    if (roles instanceof Collection) {
-      for (const role of roles.values()) {
-        const index = allRoles.indexOf(role.id);
-        if (index >= 0) allRoles.splice(index, 1);
-      }
-    } else {
-      for (const role of roles) {
-        const index = allRoles.indexOf(role instanceof Role ? role.id : role);
-        if (index >= 0) allRoles.splice(index, 1);
+    for (let role of roles instanceof Collection ? roles.values() : roles) {
+      role = this.client.resolver.resolveRole(this.guild, role);
+      if (!role) {
+        return Promise.reject(new TypeError('INVALID_TYPE', 'roles',
+          'Array or Collection of Roles or Snowflakes', true));
       }
+      const index = allRoles.indexOf(role.id);
+      if (index >= 0) allRoles.splice(index, 1);
     }
     return this.edit({ roles: allRoles }, reason);
   }
diff --git a/src/structures/Role.js b/src/structures/Role.js
index 2c9bbbbfe..c6dfb611d 100644
--- a/src/structures/Role.js
+++ b/src/structures/Role.js
@@ -169,11 +169,13 @@ class Role {
 
   /**
    * Compares this role's position to another role's.
-   * @param {Role} role Role to compare to this one
+   * @param {RoleResolvable} role Role to compare to this one
    * @returns {number} Negative number if the this role's position is lower (other role's is higher),
    * positive number if the this one is higher (other's is lower), 0 if equal
    */
   comparePositionTo(role) {
+    role = this.client.resolver.resolveRole(this.guild, role);
+    if (!role) return Promise.reject(new TypeError('INVALID_TYPE', 'role', 'Role nor a Snowflake'));
     return this.constructor.comparePositions(this, role);
   }