Monzon's right hand power, esp. the bomb that executed Benvenuti was awesome . He was never to front that kind of power after being shot in '73, and after arthritis and bad hands took it's toll.
Hearns carried his power up the weights quite well. Shuler and Roldan were KO'd at 160. Leonard and Andres dropped convincingly at 175. He looked powerful against Kinchen and Hill too. Hearns was still dropping bum cruisers when he was old and shot. Hearns was the biggest puncher at welter / super welter and he was one of the biggest punchers at 160, too. Its Hearns or Jackson. Now what about Hearns v Jackson?