Dhaval Kasavala

This plugin allow you display your site all user and their avatar which is selectable what you attach with post.

Contributors role with post

This is simple plugin for contributers with post.

Hossni Mubarak

HM Plugin

This <a href="https://hmplugin.com" rel="nofollow ugc">HM Multiple Roles</a> plugin provides a user interface and allows you to select multiple roles for a user.
It hides the default role dropdown list and displays a list of role checkboxes for both new user and update user page.
Multiple roles can be visible from the All User list page.
 How to use it: 
<iframe loading="lazy" title="How to use HM Multiple Roles in WordPress - 2021" width="750" height="422" src="https://www.youtube.com/embed/Kw4R8B1cV5s?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
🌟 Plugin Features:
<ul>
<li>Easy to install and use</li>
<li>Fully integrated in wordpress</li>
<li>Select multiple roles</li>
<li>No extra settings required</li>
</ul>
👍 Feedback/Rating: 
If you find this plugin helpful, feel free to give us your valuable review. Rate us and share this plugin with your friends and others. This will motivate us and help us to grow. 
<a href="https://wordpress.org/support/plugin/hm-multiple-roles/reviews/#new-post" rel="ugc">Rate Us</a>
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👉 <a href="https://wordpress.org/plugins/hm-multiple-roles/" rel="ugc">HM Multiple Roles</a> Select multiple roles for a user

HM Multiple Roles

It hides the default role dropdown list and displays a list of role checkboxes to select multiple roles for a user.

Contributors role with post vs HM Multiple Roles