I guess I'm the only vote for Willikes so far?
Epenesa is an interesting situation. In the B1G, he's T1 in sacks, 3rd in TFL, 3rd in forced fumbles (#1 among DL), plus a blocked punt. And he only played 40% of Iowa's defensive snaps. So an argument could be made he's the most disruptive player in the conference, on a per-snap basis.
Personally, he's my #4 DL choice, and it's because he only played 40% of the time. He's a one-trick pony at this point, and his inconsistency setting the edge in the run game keeps him from being an every down player.