Any p4p big punchers list starts with Julian Jackson. There's no one p4p who even comes close to having the kind of power The Hawk had in BOTH hands.

Wilfredo BAZOOKA Gomez deseves recognition too. People remember him for his war and TKO loss to the great Salvador Sanchez, but he was a fierce heavy handed bomber with 42 KOs in 44 fights.

Prince Naseem is another small guy with HUGE power in both hands.