from The MMA Manifesto: Pretty much every MMA website out there runs some sort of fighter rankings. Normally it's the run-of-the-mill pound-for-pound and/or best at each weight class rankings. We here at The MMA Manifesto tend to try to do things differently (because we're oddballs and anti-social). (Read More)
Pretty damn hard to argue with that list. Only other possibility I could see is Cyborg but I guess it doesn't really count since there is no women's division in the UFC anyway.
You could probably argue Jake Shields > Dan Henderson based on his recent record, but Hendo will probably knock Shields out when they fight so fair enough.
I've heard the argument that Shields should be ahead of Henderson - guess time will tell if that is a valid point or not!