Wow...at that level, you can play any Rachmaninov prelude you want to play.
For Prokofiev, I would recommend Suggestion Diabolique from Four Piano Pieces op.4
Also, do check out Prokofiev's sonatas, although they are longer works.
Check out Prokofiev's Vision Fugitives, you should be able to learn all of them within a week or two.
You can also try out Scriabin, such as his preludes, op.11 and op.74, shouldn't be too hard for you too. You can try his Poemes op.32 no. 1 and 2. You can even try Vers la flamme!