I'll start.

Bach's Ich ruf zu dir, Herr Jesu Christ. This particular one is an adaptation for the movie Solaris, by Edward Artemiev:



This is Henry Purcell's Funeral of Queen Mary:



Chopin's Nocturne #9:



Chopin's Nocturne # 20:



Antonio Vivaldi's Winter:



Beethoven's Moonlight Sonata, of course. Who doesn't like it?



Mozart's Agnus Dei:



Mozart's Lacrimosa:



Carl Orff's Carmina Burana:



Verdi's Dies Irae:



Prokofiev's Dance of the Knights: