I am practically going back to prehistoric times here but this is the classic section. I'm going with a pint-sized destroyer from Wales named Jimmy Wilde.
I've been watching a lot of early career Tommy Hearns lately and was surprised at how often he went to the body. He'd use a stiff jab to the body often and had a wicked left hook which he would really whip in there. Of course all his body work was designed to set up that overhand right that everyone knows about. Vastly underated as a technician is Hearns. On topic, Chavez & Duran as laxpdx mentioned are your prototypes for the lower weights. Chavez was far more deliberate in looking to land that hard shot to the liver whereas Duran would work more frequently in a style similar to Pedroza used to with the aim of wearing his opponent down in order to take him out in the later rounds. . . . which he invariably did. Barrera is a good modern day exemplar.
Tony Zale was widely regarded as the best bodypuncher in boxing during his era, a time when that was a standard tactic. Carlos Palomino and Pipino Cuevas were acclaimed for this along with Duran. Left hooks to the ribs were the primary tactic of Tony Ayala and Lupe Pintor. Mexicans have been stereotyped for having two left feet, the ability to absorb tremendous punishment, and a great left hook to the labonza. (Sal Sanchez and Miguel Canto fly very much in the face of the two left feet generalization.) Euzebio Pedroza continually buried bolo shots to the torso (and sometimes lower). He slowed down Rocky Lockridge dramatically in their first fight with his body attack. Sean O'Grady flattened Hilmer Kenty with a massive downward right to his body. O'Grady frequently discussed the value of bodypunching during his ESPN telecasts with Sal Marciano, and practiced what he preached whenever ESPN broadcast one of his fights. Bobby Czyz took out amateur opponents with his body attack, something rare for a three round amateur.
