Grieg - Notturno, Liszt - Consolation No. 3, Rachmaninoff Prelude Op. 3 No. 2, Debussy Arabesque No. 1. I recommend the first two only because they are not played quite as often as the other two.
If you want to discover new composers, maybe take a look at some Poulenc, maybe Intermezzo No.3. It may be a but of a jump from the pieces you mentioned (just remember that the melody line on top needs to sing out louder over the other notes you play).
I can't perfectly gauge your skill level on first glance, sorry if some things seem to easy or too tricky.
Topic: Repertoire