Your favorite American composers

Quite interested to see what everyone's favorite American composers are. You can list as many as you like. Since I'm binge-listening to American classical music recently, I'll use your responses as input for my playlists :)

Personally, I greatly like the music by George Gershwin, Leonard Bernstein, Edward MacDowell, Scott Joplin, Virgil Thomson and Aaron Copland, but lately I'm also exploring the music of other members of the other Boston Six (Amy Beach, George Whitefield Chadwick, ...) and Samuel Barber. I've yet to connect fully to Charles Ives' music, but hopefully I'll get there in time.