Rach 3. And Bach inventions for polyphonic thinking and hand independence, since the pieces you play afaik will not help you with that.
Kopower,As you were so kind to welcome me, I will also give you some advise.Indeed Bachs inventions, first the 2 part, for independence. There is no better teacher than Bach. I learned everything from him through my private teacher.For your own choice.Haydn or CPE Bach sonates. There are a lot, from easy to quite tough.Be careful do not hurry, be patient, try to learn one piece very good before going on.