Fermi, Oppenheimer? Some American or (naturalised American) scientist responsible for the USA becoming the first and premier nuclear power?
Yeah the lack of scientists and Captains of Industry types in general is kinda frown inducing to me. Though I suppose it could depend on the definition of heroes or being heroic or whatever.
I'd probably put Norman Borlaug on my fanficy list. Plus there's dudes like Jonas Salk, Abel Wolman, John Enders etc.
I do like that Amelia Earhart made it and Charles Lindbergh doesn't. Still proves you have to reach a certain threshold of arbitrary palatability to be worth commemoration it seems.
Putting Joshua Chamberlain up there in lieu of a billion other Civil War figures is odd though. Ulysses S. Grant would be an obvious choice. Ambrose Burnside would be ironic too since he helped found the NRA which would be Boss. Joseph Wheeler and James Mosby would be nice picks as well for genuine symbolism and historicity and maximum troll.
Also give Lafayette and Von Steuben a statue. A Frenchman and Prussian who were crucial during the American Revolution and both were technically American citizens anyhow.