In order of greatness (according to Experts):
Sugar Ray Robinson
Muhammad Ali
Harry Greb
Manny Pacquiao
Willie Pep
Henry Armstrong
Roberto Duran
Sugar Ray Leonard
Sam Langford
Archie Moore
Mickey Walker
Benny Leonard
Joe Gans
Joe Louis
Carlos Monzon
Jimmy Wilde
Roy Jones Jr. (prime)
Kid Gavilan
Stanley Ketchel
Jake Lamotta
Pernell Whitaker
Julio Caesar Chavez
George Foreman
Thomas Hearns
Tony Canzoneri
Barney Ross
Marvelous Marvin Hagler
Rocky Marciano
Jack Johnson
Jack Dempsey
Jimmy McLarnin
Larry Holmes
Wilfredo Benitez
Mike Tyson
Floyd Mayweather
Bernard Hopkins
Salvador Sanchez
Jose Napoles
Emile Griffith
George Foreman
Michael Spinks
Alexis Arguello
Aaron Pryor
Pancho Villa
Ricardo Lopez
Sandy Saddler
Carmen Basilio
Bob Fitzimmons
Jersey Joe Walcott
Bob Foster
Carlos Ortiz
Wilfredo Gomez
Evander Holyfield
Billy Conn
Jim Corbett
Sugar Ray Robinson
Muhammad Ali
Harry Greb
Manny Pacquiao
Willie Pep
Henry Armstrong
Roberto Duran
Sugar Ray Leonard
Sam Langford
Archie Moore
Mickey Walker
Benny Leonard
Joe Gans
Joe Louis
Carlos Monzon
Jimmy Wilde
Roy Jones Jr. (prime)
Kid Gavilan
Stanley Ketchel
Jake Lamotta
Pernell Whitaker
Julio Caesar Chavez
George Foreman
Thomas Hearns
Tony Canzoneri
Barney Ross
Marvelous Marvin Hagler
Rocky Marciano
Jack Johnson
Jack Dempsey
Jimmy McLarnin
Larry Holmes
Wilfredo Benitez
Mike Tyson
Floyd Mayweather
Bernard Hopkins
Salvador Sanchez
Jose Napoles
Emile Griffith
George Foreman
Michael Spinks
Alexis Arguello
Aaron Pryor
Pancho Villa
Ricardo Lopez
Sandy Saddler
Carmen Basilio
Bob Fitzimmons
Jersey Joe Walcott
Bob Foster
Carlos Ortiz
Wilfredo Gomez
Evander Holyfield
Billy Conn
Jim Corbett
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