If you like Lizst as a piano composer, I'd like to metion Shopin and Schubert (although Schubert is from the begining of the romantic period, his "songs" for piano are exallent). I remember having fun studying them when my music class started to learn romantic music.
Shopin actually took piano music to the next level, developing alot of small songs. He's one of the first composers that took preludes and connected them together, like other composers did with miniatures for piano (see: Schuman's Carnaval, a good example of miniatures connected to an extended piece. Although, I rally did'nt like studying it).
Also, anybody else here has fun watching Mezzo's Clasic Sequence?
I really like like it. Alot of Beethoven, Some Mozart (I actually never really liked him) and I've seen Wagner and Brahms there too.
Even some modern music.