Right now I'm saying Roy.

Capturing titles from middleweight all the way up to heavyweight is an incredible feat.

And aside from Mike Tyson no boxer ever looked better beating up B list opponents than Roy Jones.

Mayweather is a defensive master and an awesome fighter, but Roy Jones had an offensive arsenal that was simply dazzling to behold.

Still Floyd's unbeaten run is impressive and he's still going. He could yet overtake Roy providing he doesnt' lose.