HUGE classical fan.
Some of my favorites/highlights (and I've played a lot of these):
Bach - Chaconne from Partita No. 2 for Violin
Bartok - Concerto for Orchestra
Copland - Appalachian Spring; Rodeo
Elgar - Enigma Variations
Rachmaninoff - Piano Concerto #2
Vaughan Williams - Five Variants on Dives and Lazarus; Symphony #5; Rhosymedre; Lark Ascending
Respighi - Pines of Rome; Ancient Airs and Dances
Barber - Adagio for Strings
Shostakovich - Symphony #5, Waltz from Jazz Suite 2; Festive Overture
Stravinsky - Firebird
Beethoven - Symphony # 3, 5, 6, 7, 9; Piano Concerto 5; Moonlight, Pathetique, Apassionata sonatas; Violin Concerto
Bizet - Carmen; L'Arlesienne Suites
Brahms - German Requiem
Chopin - Fantasie Impromptu
Dvorak - Symphony # 8, 9
Liszt - Les Preludes; Hungarian Rhapsody 1, 2; Hungarian Fantasy
Mendelssohn - Symphony 3
Mussorgsky - Pictures at an Exhibition
Rimsky-Korsakov - Cappricio Espagnol
J. Strauss - Emperor Waltz
Tchaikovsky - Symphony 4, 5, 6; 1812; Cappricio Italien; Violin Concerto; Piano Concerto #1
Wagner - Elsa's Procession to the Cathedral from Lohengrin; Siegfried's Death / Funeral March from Gotterdammerung
Holst - Planets; 1 & 2 Suites for Military Band
Grainger - Lincolnshire Posey; Irish Tune from County Derry
Gershwin - Cuban Overture; Rhapsody in Blue
Anyway, those are just a few, brief highlights.
I had to cut out so much good stuff by those same and other composers