Gaurab

Bulk delete users by role from the WordPress admin. Posts from deleted users are reassigned to the current user. Administrator accounts are protected from deletion.
<h3>License</h3>
This plugin is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Bulk User Delete

A plugin to bulk delete users based on role, with post reassignment to the current user.

thenbrent

Using custom post types on your site?
Install this plugin to control which roles can publish, edit and delete posts of each custom type.
For this plugin to work, your custom post type must meet a number of requirements as outlined in the <a href="https://wordpress.org/extend/plugins/map-cap/faq/" rel="ugc">FAQ</a>.

Map Cap

Control who can publish, edit and delete custom post types.  Silly name, useful code.

Bulk User Delete vs Map Cap