LOL, Bruce Lee would get his ass beat down by todays guys. He is WAY too small to be anything but compared to pound for pound. His abilities got magnified by his movies that made him look super human. No disrepect, I love Bruce lee. He was a brilliant guy and an awesome martial artist, but he would get completely killed by many many people today. He couldn't even make the UFC cut.
Ali is a boxer not a fighter, there is a difference. In a boxing match, he could stand with anyone, in a fight he would get eaten alive.
I think Chuck Lidell is what a fighter should be. Tough as nails, knockout power, incredible takedown defense, laser guided punches etc.. The guy is an animal.