The man who beat the man
When Ali beat liston, there was one champion - since then...
Muhammad Ali, Joe Frazier, George Foreman, Muhammad Ali (2), Leon Spinks, Muhammad Ali (3), Larry Holmes, Michael Spinks, Mike Tyson, Buster Douglas, Evander Holyfield, Riddick Bowe, Evander Holyfield (2), Michael Moorer, George Foreman (2), Shannon Briggs, Lennox Lewis, Hasim Rahman, Lennox Lewis (2)
And Lennox retired as Lineal Champion.