The best I think you gotta go with Jens Pulver. Let's face it people, the reason why Tito did so well on TUF3 is because Ken Shamrock was an absolute waste on TUF3.
Pulvers team had to face much better competition on BJ's team then Tito had against Shamrocks. Pulver brought in a BJJ, wrestling, and striking coach. Most of his fighters fought well and not to mention Pulver had an excellent "draft" so to speak.
That being said, Ken Shamrock was without a doubt the worst coach EVER on that show. I can't believe some of you people think Hughes was close, Shamrock just takes the cake for this. The guy brought in a weight lifter for one of his coaches, simply because it's his best friend! He pretty much had no conditioning program considering EVERY fighter on that team was in horrible shape. He also picked horrible guys, I mean c'mon, Jesse Forbes #1 pick?????? His team won a total of 3 fights, 2 of which coming from the same fighter.
Ken Shamrock was such a disgrace on that show...but again, it's what made TUF3 great