Only McCallum as number one is easy the others are hard. I have Nelson second because I´m a fan actually and Toney last because he was caught cheating at hw twice which takes quite a bit about his weight-jumping achievements IMO.
I actually labled this thread by order, but im not about to debate these guys as i think you can make a case for all of them. In other words mix these guys up whatever way you want not to much of an argument here.
I don't know enough about Azumah Nelson but the rest : Toney McCallum Marquez Tito If I knew about Nelson I believe Tito would have still been the last as Tito was a cheater.
I second this ranking. Toney's achievements at the higher weights are questionable now, given what's known. He also was given a gift against Dave Tiberi.