Post office muralist, Edward Millman, is another social realist I was not familiar with, and, like so many of the muralists (and myself), he is a School of the Art Institute of Chicago alum. (Sorry, SAIC. Probably didn’t think I’d end up making postcards when you accepted my application).
Anyway… Millman’s work is not limited to social realism. You can see examples at the Smithsonian American Art Museum’s website, the Naval History and Heritage Command’s website, the Whitney’s website, and the website for the Art Institute of Chicago.
Millman made two (or four) post office murals: a series of three in Decatur, Illinois and Ploughshare Manufacturing (Moline, Illinois).