How about some Brahms? I think you'd be able to tackle most of his pieces. The waltzes and the hungarian dances are wonderful!
Since you like Grieg, maybe you could try a transcription of any of the songs from the Peer Gynt suite. Those are very flowing, balletic and pretty, though I am not really sure of their difficulty(if anything I would assume they are easier than Debussy's Arabesques).
What about Saint-Saens' "Le Cygne"(The Swan)?
There is a nice transcription of Ponchielli's Dance of the Hours from La Gioconda, and you will probably recognize the tune!

I agree with Henrah..Debussy preludes would be a nice addition to your repetoire (Feux d'artiface is my favorite one), but I'm thinking maybe you might want to branch out from the whole "Minimialist" style.
You might like some of Chopin's preludes, or a song from Mendelssohn's "Songs without words".
You also might like Prokofiev's Visions Fugitives, though they might take some listening to grow into.
Hope this helps.