We'll create fresh WordPress site with WYSIWYG Comments with Trix Editor installed. You have 20 minutes to test the plugin after that site we'll be deleted.
This replaces the WordPress comment submission form with a WYSIWYG rich-text editor. It includes a toolbar for bold, italic, links, embeds, blockquotes, code, and lists.
The editor used is Trix, written by Sam Stephenson and Javan Makhmali for Basecamp. This WordPress integration is by Jamie Zawinski.