Real quick like ...
The only real world action figures I would buy and would love to see happen are Franklin Roosevelt and Winston Churchill.
My reasons are simple: Franklin Roosevelt founded the Justice Society of America. He is considered by them to be an honorary member. Likewise, Winston Churchill founded the Invaders. They would not exist without him. I would happily put Roosevelt and Churchill on my (meager) Golden Age shelf.
As far as the other big real life players from World War II ... Stalin, Hirohito, Mussolini, Hitler, Eisenhower, Rommel, Patton, Truman, de Gaulle, Tojo, Zhukov, Oppenheimer ... nope. Don't want 'em.
It's a moot point because it's extremely unlikely Roosevelt and Churchill figures will ever be made and that's okay too.