1920s.

Pancho Villa
Jack Dempsey
Gene Tunney
Harry Greb
Mickey Walker


1930s

Barney Ross
Henry Armstrong
Panama Al Brown
Kid Chocolate
Joe Louis


1940s

Joe Louis
Ezzard Charles
Sandy Saddler
Sugar Ray Robinson
Willie Pep


1950s

Sandy Saddler
Sugar Ray Robinson
Archie Moore
Rocky Marciano
Kid Gavilan

1960s

Muhammad Ali
Nino Benvenuti
Fighting Harada
Nicolino Locche
Carlos Ortiz

1970s

Muhammad Ali
Roberto Duran
Alexis Arguello
Carlos Monzon
Ruben Olivares

1980s

Larry Holmes
Marvin Hagler
Roberto Duran
Julio Cesar Chavez
Sugar Ray Leonard

1990s

Roy Jones Jr
Pernell Whitaker
Oscar De La Hoya
Julio Cesar Chavez
Ricardo Lopez

2000s to 2006.

MAB
Erik Morales
Roy Jones Jr
Floyd Mayweather Jr
Bernard Hopkins

My Current Top 5

Floyd Mayweather Jr
Manny Pacquiao
Bernard Hopkins
Joe Calzaghe
Juan Manuel Marquez

These lists were not in any order i really struggled but i tried my best.