Oh I forgot about Foreman and Tyson, of course. Foreman had great right AND left uppercut - ask Cooney
Assuming we're not limiting this to HWs, I'll add Roberto Duran. He used the UC in creative and effective ways and, most impressive to me, he needed almost no room. It would look like he was chest to chest, then suddenly his man's head would snap up behind a Duran fist that seemed to pop out of his throat.
Mike Tyson has got to be at the top of the list. He put together his punches so well in his prime. He could rip with both hands and had incredible speed. Even later he was able to drop Buster Douglas with a single uppercut in a fight where Douglas took next to no punishment. Tyson had legit one punch power in those uppercuts.
Amongst the heavy guys, Louis and Liston had brutal uppercuts. Olivares and Saddler deserve mention for the smaller guys. Some of Saad Muhammad's uppercuts are devastating. Michael Spinks had a great uppercut as well.
After his disappointing call against Godoy ,Louis was coached to throw uppercuts with both hands ,the perfect antidote to the croucher and shorter guy.He ripped Godoy's face to bits in the return.
Thats more of a bolo punch than an uppercet. You're not meant to throw uppercuts that far out.. If he landed them all , why was AJ not spread out for the count , or ever look like his head was going to fly clean off like Wlads?
What Wlad shoulda done there is follow through with a left hook / right cross.. Job done. But he couldn't and its a display of poor ring IQ , much like his older brother Vitaliy. Joshua was out on his feet for all that round. The guy was ripe for the taking and Wlad still couldn't put a sequence of shots together to take him out. The guy you worship is a bigger joke than Deontay Wilder ans thats am absoulte FACT.. Wilder would have had Josuha splattered in that sitation Prove me wrong???