Ahsan Rehman

This plugin allows you to display an unordered list of post (or custom post type) links (with title, featured image and exceprt) to a specific author (or multiple authors), category (or multiple categories) and tag (or multiple tags). It can be called either with a shortcode or from within a theme file.
To call it with a shortcode, use <code>[latest]</code> below are the attributes you can use with this shortcode: 
* Authors: 
 [latest author=”username or multiple usernames separated by comma”] 
* Category: 
 [latest category=”category name or names separated by comma”] 
* Tag: 
 [latest tag=”tag name or names separated by comma”] 
* Post Type: 
 [latest post_type=”post type name”] 
* Show Posts: 
 [latest show=”number of posts to show”] 
* Show Excerpt: 
 [latest excerpt=”true (default is false)”] 
* Show Thumbnail: 
 [latest thumbnail=”true (default is false)”]
To call it from within a theme template, you have to wrap it in this PHP function: <code><?php echo do_shortcode('your shortcode goes here'); ?></code>

WordPress Latest Posts by Ahsan

A plugin which enables you to get latest posts by authors, categories and tags, with featured images, excerpt, works for custom post types as well

flocsy

Authors Widget shows the list or cloud of the authors, with the number of posts, link to RSS feed next to their name, avatar. It is useful in a multi-author blog, where you want to have the list in the sidemenu. 
The widget can also display an “Author Cloud” if <a href="https://wordpress.org/extend/plugins/seo-tag-cloud/" rel="ugc">SEO Tag Cloud plugin</a> is installed.

Authors Widget

Authors Widget shows the list or cloud of the authors in the sidemenu.

WordPress Latest Posts by Ahsan vs Authors Widget