You could always to some of the more obscure works from those composers... like Chopin's La Ci Darem La Mano or Fantasie in f minor, Liszt's Ballade, Mendelssohn's Fantasy, or Rachmaninov's underplayed (currently) 1st Sonata.
Or...
Brahms - Rhapsody Op.79, No.1, Sonatas
Balakirev - Nocturne No.3 in d minor
Gottschalk - Grand Tarantelle or L'Union op.48
Chaminade - Two or three etudes
Field - Nocturnes
Faure - Theme & Variations in c# minor, op.73
Glinka/Balakirev - Piano Transcription, "Fantasy on a life for the Tsar"
(Fanny) Mendelssohn - Sonatas, Songs without Words Op.6 or Op.8
Oh, also....
Lyadov - Variations sur un theme Polonais Op.51
Lyapunov - Fetes de Noel, Op.41, 4 Songs Op.14 or Op. 71, or some of his transcendental etudes.
etc.