Starting in 1910s 1910s Jack Johnson 1920s Jack Dempsey 1930s Max Baer 1940s Joe Louis 1950s Rocky Marciano 1960s Muhammad Ali 1970s Joe Frazier 1980s Mike Tyson 1990s Lennox Lewis 2000s Wladimir Klitschko 2010s Wlad?
70s, 80s and 90s are tricky because you had at least one other candidate who equally had a claim to being the best of that decade.
I suspect this post will soon break out with a huge Wladamir Klitschko related argument. Let the games begin!
1900s Jack Johnson 1910s Harry Wills but you could make a case for Dempsey 1920s Gene Tunney 1930s Joe Louis 1940s Joe Louis 1950s Rocky Marciano 1960s Muhammad Ali 1970s Muhammad Ali 1980s Mike Tyson but Holmes has a strong case as well 1990s Lennox Lewis 2000s Wladimir Klitschko 2010s Wladimir Klitschko