asokaaso2

This plugin lets you filter the posts and any CPT from the dashboard. Additionally, if the post type supports author metabox, this plugin will also transform the select field. Note that this plugin uses select2 library so it might cause conflicts with other plugins. Compatible with ACF.

Kikx Simple Post Author Filter

A way to filter posts by authors from the dashboard and set the author of individual posts.

freemp

A simple, lightweight WordPress plugin to completely disable author archives/pages (regardless of whether the corresponding author really exists) and make the web server return status code 404 (‘Not Found’) instead. Related links will also be either disabled or completely removed.
The plugin does not require any configuration. Once activated, it will start doing its job.

Disable Author Archives

Works!

Disable Author Archives completely removes author archives and makes the web server return status code 404 ('Not Found') instead.

Kikx Simple Post Author Filter vs Disable Author Archives