Sirius Pro

Simply exclude all author posts from indexing it in SERPs. This plugin allows you to noindex posts for certain authors without modifying the code and it works with most of the available themes. Just install and activate this plugin to add noindex and nofollow meta for all author posts.
Read more about this plugin on <a href="https://siriuspro.pl" rel="nofollow ugc">WordPress</a> blog.

Noindex Author

Simply exclude all author posts from indexing it in SERPs.

shwetuk

Simple plugin helps to personalize authors or users page with sidebar widgets specific to authors or users page. It will display author specific tags. 
Features: 
1. Custom widget title, option to add author name. 
2. Counts number of posts by author. 
3. Easy to add.

Author Tags

Displays author specific tags with post count on single post page

Noindex Author vs Author Tags