Harry Truman has my vote also...For the things you mention plus saving me and a lot of guys on Luzon, other staging areas plus many ships and planes from having to invade Japan..where the Japanese had already prepared to fight to the last for the emperor..
I always liked the letter he wrote to Washington Post critic who beat up on Harry's daughter's singing...it is probably on the internet somewhere...it is a masterpiece. It is the center piece of every book ever writte by or about him.