Chuck Webb by a mile for the best I've seen.
Underrated is going to an interesting discussion. I could see Little Man Stewart and Travis Stephens in the argument, but to put a spin on the idea, I am going to throw Travis Henry in the mix. At the end of his career he started to get recognition, but for much of his time in Knoxville all you heard about was Jamal Lewis. I had a friend who made a brilliant observation that we had one running back that started and another that produced.