Vinicius Braz Pinto

This plugin will trigger a 404 error for all author pages and replace author links generated by WordPress with links to the home page.
There are no settings, the plugin is supposed to be simple and just work for this specific task.

Remove Author Pages

Remove author pages and link authors to home page

shawfactor

This plugins allows you to have a configurable list of html elements and html element attributes that will be removed from the content of posts,pages, and custom post types when they are saved.

LH HTML Cleaner

Removes blacklisted html tags and attributes.

Remove Author Pages vs LH HTML Cleaner