Patterson: Archie Moore Ingemar Johannson x2 Oscar Bonavena Henry Cooper George Chuvalo Yvon Durelle x2 Eddie Machen Tommy Jackson Klitschko: Sam Peter Corrie Sanders JC Gomez Herbie Hide Larry Donald Kirk Johnson Danny Williams
Patterson was a light-heavy, he moved up as well. If the question was whos the better heavyweight I'd choose Klitschko but Patterson has the better resume.
Edit: I just wrote a response assuming that I was comparing Archie Moores victim's to VK's. Not sure what was going through my mind there.
OK I will try again: You might want to consider whether smaller heavyweights like Archie Moore and Eddie Machen might have been able to beat guys like Sam Peter and Kirk Johnson.