http://cdn2.sbnation.com/imported_assets/810488/8_medium.gif Mayweather has the best one I've seen. Hamed had a nice lead left. btw I understand that the gifs I put up aren't textbook lead rights. I don't care.
Julio Cesar Chavez vs Jose Luis Ramirez. Excellent lead rights as well as counter rights in that bout by Julio.
Sugar Ray Leonard, you have to be awful quick to pull off a true lead right hand and he was great at it. aforementioned mayweather has a great one as well
Hopkins' lead right is brilliant like everything else in his game. If we are switching it up and allowing for lead lefts from southpaws, then Pac is an obvious choice. One of the more dominant single punches of recent memory.
Hagler could be pretty useful from either stance. Not as fast as the above mentioned but just as effective when he need to be.
Hopkins For the record I thought Hagler sucked as a righty. Id have to go back and watch but he may have lost every round I ever saw him turn orthodox in. I never understood why he sometimes insisted on fighting that way.
Hopkins is 1st person i thought of , i seem to remember marquez once landing lead right uppercuts on this guy i think it was victor polo n remember thinkin how the fook is he doin that.