Favorite works by popular composers that you don't often hear?

Here are a few of mine:

Mozart: Sinfonia Concertante (vln/vla)

Beethoven: Egmont Incidental Music

Dvorak: Piano Quartet No. 2

Faure: Piano Quintet No. 1

Brahms: Variations on a Theme by Handel

Prokofiev: Flute Sonata

Bartok: Contrasts