I listed some classical works I like.
Don Juan, Op. 20 - by Strauss
Duo for Violin and Viola in G major, K. 423 - by Mozart
Duo for Violin and Viola in B flat major, K. 424 - by Mozart
Ein Heldenleben, Op. 40 - by Strauss
Till Eulenspiegel's Merry Pranks, Op. 28 - by Strauss