some great picks here
Tyson, RJJ, Whitaker, Toney, etc... all had great styles
I'd add some who hasn't been mentioned, Pryor with his all out aggression but somehow still defensively good, Hearns with hgreat boxing mixed w killshots and the goat Ray Robinson who was supremely skilled but wasn't as much of a textbook guy but seemed to make up shyt in the heat of the moment, was creative as hell based on the videos we have about him and he isn't even at his prime there.
Also Nicolino Locche with his crazy evading skills.