Tier 1 opponents:
Lennox Lewis
Vitali Klitschko
Wladimir Klitschko
Chris Byrd
James Toney
John Ruiz

Tier 2 opponents:
Mike Tyson
Lamon Brewster
David Tua
Hasim Rahman
Jameel McCline
Sam Peter
Michael Grant

Tier 3 opponents:
Oliver McCall
Fres Oquendo
Kirk Johnson

Obviously I had left out Evander Holyfield & Andrew Galota as he had already fought them but if you want to add them feel free.

But anyway, it occured to be that it was quite possible that Bowe (if he was still doing his thing during say 2001) could loose to well over 50% of fighters on that list which surprised me, I just wondered if anyone else has it the same way