I don't think Marciano is number 2 on an all time list, he was too limited (probably why he was an underdog) and the level of competition was not as strong as other eras. I think the '0' elevates him higher then he should be when compared to others.
Not much argument with Louis, a phenomenal record.

BTW The Queen Mother never had a 'glorious smile'.
Henry Cooper, before my time but what was the fuss about?
Bobby Charlton - England's highest scorer but not the best (Greaves on a goal per game) and perhaps the weakest of the Law, Best, Charlton Trinity

That's three taboo's broken, anyone else think of any further criticisms of the sacred three.