Anton Rubinstein Concerto
Cesar Franck variations for piano and orchestra - brilliant writing.
Schumann Concerto - so wonderful to play and study! its form is like grieg since it was grieg's model i think but it sounds so different, the textures of the piano part and the orchestra alone or together... beautiful work!
Kachaturian - very Lisztian virtuosity
Granados - chopinesque though
Symanowski - sometimes i don't like it, hehe
How about Bach?
Bartok 2nd - if you wanna work
Bartok 3rd - beautiful work
Bartok 1st - exciting
Busoni - if you wanna die
Lutoslawski - haven't heard it yet
Barber - brilliant and bravura
Scriabin - beautifiul melodies, great writing, sometimes reminds me of grieg in the 3rd movement though, hahaha.
well, what else is not banned for you? hehe. i can't think of other concertos but if i were you, i'd work on the classical concertos first like mozart of beethoven... but you've crossed those two out already. beethoven 2nd is a good start, learn it in a month, then proceed to some mendelssohn or mozart seriously... then go for rachmaninoff 1 or 2, then go backwards with schumann, then maybe move forward with chopin 2nd, beethoven 1st, 3rd and 5th, then prokofiev 3rd, then start reading rachmaninoff 3rd while you seriously work on mozart d minor concerto... after that, go for the brahms 2nd while you keep on reading rach 3, then finally start learning rach 3. after rach 3, everything else shouldn't be a problem. haha, some good for the mind, some good for the heart.
then start having fun with ravel in G, shostakovich no. 2, or rach paganini variations.
actually, that's my personal plan.

hahaha i hope that happens. am giving myself until the age of 45. after rach 3, i can say that finally i'm a pianist already, hahaha.