I would rank them thus:
Mark Simoneau
Terry Pierce
Josh Buhl
Jeff Kelly
Ben Leber
I am very biased towards 2002. That year we were really good. I think Jeff Kelly is probably better than Buhl, but Buhl was a tackling machine and I remember his era better. Buhl/Hickman were exposed after Pierce left, but I think it was more Hickman and Buhl was relegated to D.Sproles "wtf everyone?" 2004 status. Leber I'm very meh about.