I picked Sugar Ray but it really depends on how we are grading them as "best". If you are saying who, in my opinion, should be ranked the highest historically, then I stand by Ray. If you are asking who played the game the best (factoring in self promotion, risk vs. reward...etc.), then it becomes a Ray vs. Mayweather debate in my mind. If you are asking who was the most physically gifted and impressive of the three, then that would be Roy in my opinion. Either way, all three are/were great fighters and accomplished more than the vast majority could ever dream of.