From the poll choices I think it's a toss up between prime Fedor and PRIDE Wanderlei. Shogun is never 100% healthy, BJ lost to Edgar despite being motivated and Vitor (even the 'old one') was never invincible anyway.
You're one of my favourite posters on the MMA forum Haggis. You get into a lot of heated debates, but you stand your cause, and you make a good account of yourself (no homo) ps - Prime Fedor beats ANY man in history :smoke