BoxRec

Holyfield or chuvalo, both are know for using there head alot in matches
Holyfield - Rahman was the main recipient of his head
Chuvalo - ali prob got butted most by chuvalo but ive not seen all his fights

I can think of more incidents with Holyfield.

But I think George had the complete game...
elbows, headbutts, low blows, back of the neck shots and hitting on
the break...he was a little less refined than some others who are adept
at fouling.

Let me watch more of Chuvalo over the weekend before I cast my
vote :)

Holyfield

Guy has like 18 kids, doesn't he?