Larry Allen - Greatest Of All Time at his position. You'd be damn hard pressed to find someone as good. I remember Madden mentioning it as an announcer one game, that he was blessed to have seen two of the GOATs play in Jerry Rice and Larry Allen.
If anyone is curious, we won that game 24-16
EDIT: Given Larry's loquaciousness, what do you think the coaching sounds like? "Hmph, hands up. Different. Other way. Left foot front. Me Larry, me eat linebackers." All of that in under an hour.
http://www.dallascowboys.com/multimedia/multimedia_center.cfm?id=DDE6A78D-CB74-9DC6-AD9542D1E8F384BE
Honest to all things Holy, I've never heard him talk that much from the day he was drafted until now, as he did in that video.