These fights are at heavyweight. Everyone fights everyone. What do you see their records coming out as and who comes out on top? 2 points for a KO and 1 for a decision win. The only reason I threw Haye in there is just pure curiosity if anyone gives him a chance against these guys.
1950 Ezzard Charles 184 lbs.
1985 Michael Spinks 200 lbs.
1994 Michael Moorer 214 lbs.
2003 Roy Jones 193 lbs.
2003 James Toney 217 lbs.
2009 David Haye (Assuming his toes all work

) 217 lbs.