Personally, the easiest Nocturne for me are 9/2,15/3,37/1,Op.Posth ones,32/1,55/1
If you don't like Bach, play Handel Suites. The Harmonious Blacksmith HWV 430 is a good choice. If you want to play more Scarlatti, you can play L.23 in E Major or L.422 in d minor(though its very hard and a little bit above your level.If you want to play Bach, play his French Suites. Start with No.1(shortest and easiest), and move on to 2,then to 6,then to 4, and finally to 3 and 5.
For classical repertoire, I would start working on Mozart and Haydn Sonatas. A good Sonata to start with is Hob.XVI :35 by Haydn. My first was that one. My second was Hob.XVI 34. If you want Mozart, play K.283,284,331, or 332.
When I have romantic repertoire, it is usually a Liszt or Schumann, a Schubert Impromptu, and one or two Chopin pieces.
Liszt-Consolations:No.3 and 5 are my favorite, 6 is hardest. Or you can get the book At the Piano With Liszt. It has a bunch of easier Liszt works.
Schumann-Scenes from Childhood Op.15 are beautiful short pieces that are about your level. My favorites are Nos.3,11, and 13. After Op.15, you can move on to Op.18(I am working on this one),Op.2, or Op.12
Schubert- I see you already have a Schubert piece.
Chopin-Mazurkas. You can do any, but I recommend to not play the Op.50,56, or 59 Mazurkas. OP.56 (for me) is very difficult. No.1 has a very hard coda,infested by Sixths. No.3 is very hard to play well.
Chopin-Easier Nocturnes. I think your best bet is 15/3 or 37/1.
A 20/21st Century work-Sonatina 1959 by Khachaturian, Variations Op.40 by Kabalevsky, Three Moods by Copland, or if you are daring, try the Cat and the MOuse. The Cat and the Mouse by Copland is a very hard work. Your accuracy has to be 100% to please the audience.Here is a link to a video of this work:://www.youtube.com/watch?v=WyYjLelm0Ew