Featured Comments is a great little plugin that lets you easily feature and / or bury comments. The idea is to emphasize comments that you want to stand out and to hide (bury) comments that have little or no value. When featured, comments will get a new “featured” class added to their HTML. When buried, comments will get a “buried” class added. You can use these classes to style the comments as you wish.
This plugin was originally written Utkarsh Kukreit, but I have taken over development and maintenance of the plugin since he is no longer interested in keeping it up.
From the comments dashboard page, you will be able to mark any comment as featured or buried:
You can also mark comments as featured from the Edit screen for individual comments:
The HTML markup of the comments will look something like this on the front end (will differ slightly):
In Appearance > Widgets, you will also have a new “Featured Comments” widget.