i think it really is a question of good defense (hopefully you wouldnt need to have a good chin!) and a power shot. Lennox lewis would do well,as would the usual suspects, tyson,foreman,frazier. however, surprisingly there was less emphasis on power in the bareknuckle era, punches came from the arms and volume of punches was deemed more important than power.perhaps this is due to the fact that a relatively little amount of power is needed to knock an opponent down when a shot is thrown minus gloves.