some very good names in this thread.
for me, its always been peter warrick. there have been plenty of great players over the years. but when he got the ball in his hands in the passing game or on a punt return, you truly felt he could go the distance every single time.
close second would be reggie bush.
and marshall faulk was electric in college too. hes probably one of the few who happened to be outstanding in college ... and then truly outstanding in the pros. thats rarer than people think.