BoxRec

Is Kabayel the greatest heavyweight puncher in the modern era? 3 body punch kos in a row against highly ranked fighters. I barely see any heavyweights scoring body punch knockdowns.

Prime Dillian Whyte used body punching to great success, maybe not in stopping opponents, but definitely breaking them down.
Tyson Fury had/has a lovely rangy left hook shot to the body, that combined with his long reach, made it a pretty effective tool.
But yeah, Kabayal is definitely at the forefront of HW body punching right now.

If you're talking currently, then Kabayel and Whyte are two great shouts.

If you're talking ever, then Smokin' Joe Frazier has to come into the equation.