ok.... 1992. Ill give it a shot, alot changed in that year too.

Evander Holyfield
Riddick Bowe
hmm... Tony Tucker
Ray Mercer(assuming HOlmes did whip him before October 1st lol..)
Razor Ruddock
Lennox Lewis
Tim Witherspoon
Tony Tubbs.... 2 more,
George Foreman....
No idea

Was I even close?