Eh, just very few and mostly the obvious stuff:
Holst, "The Planets" - a must have, really brilliant. Probably the basis for 95% of the good movie scores.
Prokofiev, "Alexander Nevsky"
Ravel, "Bolero" - I love the way it's so simple and just keeps building; elegant in that it's a simple idea beautifully executed
Mussorgsky, "A Night on Bald Mountain" and "Pictures at an Exhibition" - yeah, "Night" was purchased only because it's just the coolest fucking part in Fantasia, but "Pictures" is EMINENTLY enjoyable; I love the way the main theme keeps recurring to bring you back in each movement, before it heads off in a different direction
Stravinsky, "The Firebird" and "The Rite of Spring" - okay, more Fantasia moments, but worthy ones at that; and I discovered "The Firebird" WELL before Fantasia 2000; as for "Rite" - well, what can you say? It was, in a sense, the heavy metal/punk rock of its time.
Gershwin, "Rhapsody in Blue" - Sheer fucking genius.