Sherk, Griffin, Alvarez, Kawajiri, Aoki, JZ, Ishida, BJ, Aurelio. And while I don't want to say it Stevenson would beat Dida most likely.
However If Stevenson doesn't respect Dida's power he will be KO'd round 1 no doubt. He would be better off not even trying to set up his shots just shoot in and take Dida down.
I agree with all your picks. The Kenflo JZ fight would be pretty badass. But this tourney would be pretty pointless because BJ is head and shoulders above the rest. Its like having a WW Grand Prix with GSP, or HW GP with Fedor. The out come is etched in stone.