There are certainly many fine suggestions already.
I'd add:
Respighi - Feste Romane
Shostakovich - light scores (The Bolt, Moscow-Cheryomushki, e.g.)
Virgil Thomson - The Plow that Broke the Plains (film score)
Holst - Suites 1 & 2 for Concert Band
Stravinsky - Firebird, Rite of Spring
Hindemith - Mathis der Maler
Bartok - Concerto for Orchestra
Orff - Carmina Burana
Copland - Billy the Kid, Rodeo, Red Pony (RP is a film score)
Kodaly - Hary Janos
Although it's from the 19th century, it's still hard to find a piece that's more fun than Grieg - Peer Gynt Suites 1 & 2.
I'd add:
Respighi - Feste Romane
Shostakovich - light scores (The Bolt, Moscow-Cheryomushki, e.g.)
Virgil Thomson - The Plow that Broke the Plains (film score)
Holst - Suites 1 & 2 for Concert Band
Stravinsky - Firebird, Rite of Spring
Hindemith - Mathis der Maler
Bartok - Concerto for Orchestra
Orff - Carmina Burana
Copland - Billy the Kid, Rodeo, Red Pony (RP is a film score)
Kodaly - Hary Janos
Although it's from the 19th century, it's still hard to find a piece that's more fun than Grieg - Peer Gynt Suites 1 & 2.