I'd have to go with Edgerrin James, man it was great to have a consistent running back like him. Edge was also trying to go north and south on every run which is really something you don't see as much as you should anymore.
And while Edge was great as he was, it is amazing to think what he could have been. Remember, he led the league in rushing his first two seasons and was on his way to doing it again before blowing out his knee in Kansas City. He was never really the same after that knee injury, and had he been able to have been healthier in his younger years he could be in the conversation for one of the better backs of all time other than just being "really good."