1) Tyson - Clearly had one punch knockout power to the body. His body attacked generated as much fear as his knockout power.
2) Marciano - Ground down opponents to the body and took their heart
3) Joe louis - Amazing work to the body, in his prime just punished his opponents both downstairs and upstairs.
4) Frazier - Just ask Ali - Joe always committed to the body to set up the hook to the head.
5) Bob Fitzsimmons - Concentrated and was the first to really understand how to take an opponent out with a body attack.
6) George Chuvalo - Brutal Body puncher that set up virtually all of his KO's
7) Tua - somewhere between the styles of Tyson and Marciano always felt he should have commit more to the body.
Jerry Quarry - A complete inside fighter that had many personal demons and fought in the golden era...but his body attack was well respected.
9) Jack Dempsey - He hit everything that he was able to hit, truly an equal opportunity punisher...
10) Tommy Morrison - Always incorporated a nice body attack and he had excellent power to the body as well.

Honorable mention to George Foreman...While he probably could hit harder than anyone on the list to the body he never really focused a body attack as a defining part of his style...