Since I strictly collect post war, I'd say you can't go wrong with either Mantle's or Aaron's. Preferably Aaron's RC and what ever money left over to purchase the oldest, highest grade Mick you can find.
Clemente is another option instead of Hank, and actually maybe a better choice, but that is subjective.
Willie Mays also comes to mind as his cards seem to be hot lately as well.
Good luck.
