(Loewy's Studebaker "Avanti" design)
Oddly enough,my first thought viewing this was about the lack of notable Loewy designs or contributions. For example, PRRs K1, S1, and T1 and some aesthetic contributions to the electric GG1. One of the amazing things about Mr. Loewy’s designs is that we still see many of them every day, especially since he designed many of the logos for gas stations, the shape Coca-Cola still uses for it’s glass bottles (though his design wasn’t the first “hobble skirt” Coke bottle). I still see his logo for the US Postal Service in use from time to time, he designed the liveries for Air Force One and the Coast Guard as well.
Anyway, back to locomotives. . . I also noticed for the absence of the Southern Pacific Daylights, many diesels were streamlined too, though perhaps only a few were included because most streamlined diesels don’t have quite as much of an art deco influence.