LordPretender

Similar to the original native one, this plugin let you define the range of stats to retrieve. 
Also you will be able to add the category name of the post.
Finally, this widget will only display posts (and not pages too). 
This plugin read the top 100 of posts/pages and keep only the X first POSTS (X = number defined in the widget parameters). So, you can have less posts than requested.
Jetpack is required to work. 
A wordpress account and your blog must be linked.
You can find a demo here : http://www.spoils.fr/ 
The widget is named “Articles populaires” on the sidebar.

Jetpack Popular Posts

Using Jetpack stats, this widget will display the most popular posts.

Denys Popov

<ul>
<li>Author: <a href="https://denyspopov.com" rel="nofollow ugc">Denys Popov</a></li>
</ul>
This plugin shows the number of views on the site.

DP Post Views Counter

The plugin show how many people have viewed an article on the site.

Jetpack Popular Posts vs DP Post Views Counter