Widmung, transcribed by Liszt: https://www.youtube.com/watch?v=RJl9Z5_FKsY&hd=1 (it's based on a series of song cycles written by Robert Schumann when he finally got to marry the love of his life, Clara, who was a genius composer in her own right.)
That's a good start, and should get you beyond the standard fare. It's all piano, and it's all Romantic, and most of it involves Chopin or Liszt or both, but when it comes to piano you could do worse than those dudes.
But what about other instruments? What about Bach and Mozart? What else do you like?