honestly, i cant stand Beethoven Mozart,but Bach just passes. His fugue's are great.
My favorites at the moment are Stravinsky, especially Rite of Spring ( which I am currently trying to apply to my music;the offbeat accents, percussive Dissonance etc) Penderecki, Rachmaninoff and Prokofiev
That one Wagner piece, but can't remember it.
Sibelius: The Swan of Tuonela