There were 2 of them in 1926. Jack Dempsey was Champ in 1926, until Losing the Heavyweight Title to Gene Tunney by 10 r. decision on Sept 23, 1926. So the Answer is Jack Dempsey and Gene Tunney. Tunney beat Dempsey by decision again in 1927. Hope this helped! :)
Jack Johnson
rocky balboa
Jack Johnson
Joe Louis...
martin martin
He was world heavyweight boxing champion from 1952 until his retirement in '56.
Joe Louis was World Heavyweight Champion from 1937 to 1949.
idi amin, believe it or not.
Rocky Marciano
The one and only Rocky Marciano.
Chris Archiballs. Great fighter from the mean streets.
Idi Amin Dada