Milan Kaneria

This plugin will insert a link in the comment form that will allow the comment author to delete their personal info from it that is stored in a cookie. Only unregistered commenter will be provided with the delete link if they already had a previously posted comment.
Support
For support queries, please leave your comments on the plugin page.

ET Remove Comment Author Info

This plugin allows commenter to remove their comment author details from the comment form.

Sparanoid

Displays a user badge next to the comment author name based on author’s role.
<ul>
<li>No database writes, no configurations, install, activate and go.</li>
<li>Easy styles customization via Jetpack Custom CSS or built-in Custom CSS (WordPress version 4.7 or higher required).</li>
<li>Works with <a href="https://wordpress.org/plugins/current-theme-body-class/" rel="ugc">Current Theme Body Class</a> plugin.</li>
</ul>

Comment Author Role Badge

Displays a user badge next to the comment author name based on author's role.

ET Remove Comment Author Info vs Comment Author Role Badge