Who is the most recent heavyweight champion that these fighters could beat?

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Tommy burns had a great right hand amd could realy time it. Burns was tougher and more seasoned than spinks and moorer, i give him a serious chance against smaller champions. he took the title on the road and made it a "world title", johnson was bigger not so much beter, they had simular skills.

John L sulivan was a tiger. say what you ike but the dude surly had world class power and was ruthlessly tough and famously strong. You have a hang up with the leaning back bare knuckle stance- but it worked! The klitchkos use it now!!