Thank you all, I will look through these pieces. I actually found a book of finger exercises, I have been working on those for now, but I will see what I can pick up from your suggestions. Much appreciated.
I have a question: What would YOU like to play?
Mendelssohn has some AMAZING songs without words at around the same level as Fur Elise. They are very evocative pieces, and extremely fun to play. One of the sets of pieces that aren't too overplayed, and I never hear anything about a bad experience learning any of them.His 'Venetian Boat Song' in F# minor is very good. Some intense left hand parts, and some trills, but it's a level or two lower than the Debussy stuff. Check those out though for sure, lots to choose from.Grieg's 'Notturno' from Lyric pieces. (or any other Lyric Pieces; they're all excellent)Bach Prelude and Fugue in C minor bk1, or a Sinfonia (3 part invention)?Aaron Copland "4 piano blues" - the first three are really cool, and I think the 4th one is quite a bit more difficult.Brahms Waltzes Op 39 (simplified version might be a little better. The originals are VERY difficult in some spots)Ravel Pavane for a Dead PrincessMoszkowski's Etudes for Dexterity are really cool. Pretty good technical work out and also fun to play and listen to.Chopin Preludes in B minor, E major, Db major AKA "raindrop"I'm going to throw this out there: Yann Tiersen's music from "Amelie" usually gets good feedback from my students who play any of it (it can range from stuff a bit easier than Fur Elise to a bit more difficult than Claire de Lune). There are loads of youtube videos from his stuff. I'm already expecting people to bash this suggestion, but it doesn't change the fact that it's easy listening and fun to play.
^^I don't believe that the relative level of the pieces is going to have an influence on how serious you'll be working on them.There's a list of graded pieces here: https://www.pianostreet.com/Graded_Pieces_All.xls you may want to look at it and pick those that you love.