Just the UFC or in general? It has to be Big Herb Dean in the UFC and Jason Herzog is probably the winner for all of MMA. Of course, I'm probably only picking him because he was always in videos with Jade and Mercedes before/after Bellator events.
Greenbean search history: hottest male fighters in ufc, hottest ref in ufc, how to grow Dildo shaped greenbeans, how to delete search history... That one gif with the cute sexy chicken spinning gif, delete search history (again)