I'm no boxing historian. Hell, I'm not an expert or even a massive fan anymore. I'm just curious to those who are experts or think they are... Aside from Floyd Mayweather, who are the GOAT's with similar records to Floyd(not a fan btw)? Ali lost? Foreman? Frazier? Lewis? Who never lost and retired that way and would have a reasonable chance to beat the piss out of Pacquiao or Mayweather, assuming they are at the same weight etc.