The best heavyweight of the 90ies hasn't been named yet: Lennox Lewis.
Of course the division was better in the 90ies ...Lewis, Bowe, Tyson, Holyfield, Morrison, Foreman, Moorer, Golota, Mercer, Briggs, Ruddock, Tua, Mavrovic, Ibeabuchi, Botha. Obviously the Klit's would lose a couple of times here... Lewis, Bowe, Foreman and Holy cause the biggest problems, but Tyson, Ruddock, Mavrovic, Mercer, Tua, Briggs and Ibeabuchi were dangerous too.
When you compare them to today: Peter, Chagaev, Haye, Chambers, Arreola, Thompson, Ibragimov, Adamek. I can barely name 10 ok-heavyweights.