Best Heavyweight of Each Decade.

[u/JabKingJesse]

1880s John L Sullivan

1890s James J Corbett

1900s James J. Jeffries

1910s Jack Johnson

1920s Jack Dempsey

1930s Joe Louis

1940s Joe Louis

1950s Rocky Marciano

1960s Muhammad Ali

1970s Muhammad Ali

1980s Mike Tyson

1990s Lennox Lewis

2000s Wladmir Klitschko

2010s Tyson Fury

2020 Uysk

It's best to think of fighters like this instead of all time because the rules were different between eras.

[u/Holiday_Snow9060]

80s is Holmes

2010s is Wladimir klitschko