Easy: Jim Brown, Syracuse!
Could go for quite a while naming players from Army, Navy, Maryland, NC State, Miami, Alabama, USC, UCLA, Michigan, Ohio State, etc.
I remember a Paterno interview that was done on one of the sports shows where there was a feature on Brown. Paterno said he remember going to Syracuse for a game and was in awe watching Brown run, he looked like he was just running with nobody else on the field.
I have never seen Brown play, but my Dad and Uncle did and both raved about him.
Quick story, I was told about a Browns game in Pittsburgh, where Cleveland had a 3rd and 42 and gave it to Brown and he got the first down.