Rooney, probably.
Mike Tyson Vs Mohammed Ali (both when they were in their prime)
Muhammad was quoted as saying while at ring side for a Tyson fight when asked this very question that Tyson was no worse than Frazier.I think Muhammad especially before his forced lay off due to refusing to be drafted would have boxed Tyson's ears off.
John McCain Vs Barack Obama,you can even make McCain 30 yrs younger.