I don't think he really has any competition for being king of his own division. 11 year title reign, fought every #1 contender between 1936 and 1951 except two where he was off at war. A man like him really does have to be pushed away from the sport, and hard, before he will give it up. It was only a matter of time. EDIT: Christ, didn't hear she was dead until just now http://www.isthatcherdeadyet.co.uk/
Hard to say whether 'Brown Bomber' Louis or 'Iron Lady' Thatcher wrought the most devastating carnage upon their opponents. Push comes to shove, I suppose Thatcher was a shade more merciless...