Yoh Yoshinari, of Gainax, then Trigger, has been a mecha designer/animator for
Gurren Lagann, Gunbuster 2, Evangelion, and Panty & Stocking with Garterbelt, the mastermind of Little Witch Academia, and opening animator and set designer on Kill La Kill, and, he's also apparently a Bronie. In fact, he has a semi-stealth account on Japanese art portal Pixiv dedicated to My Little Pony work.
This guy though, the amount of older cartoons stuff he's drawn
I thought you'd get a laugh from this
www.crunchyroll.com/anime-news/2013/11/22/little-witch-academia-creator-draws-my-little-pony (Source)