If I include pieces which I have memorised through teaching my beginner/intermediate students I would probably be here all day trying to write them down lol. There are SOOOOOOOoooooooooooo many small pieces to start learning the piano out there.
My main list includes;
Bach(WTC, Goldberg Variations), Beethoven (Sonata), Chopin(Etude, Nocturne, Polonaise, Prelude, Waltz), Debussy(Prelude, Etude, standard favorites), Liszt (Etude, Mephisto Waltz, Hungarian Rhapsody), Rachmaninov(Etudes, Preludes, Moments Musicaux), Ravel (Jeux J'eau, Gaspard de la nuit, Menuet Antique, Miroirs, Pavane pour une infante defunte, Sonatine, Tombeau de Couperin), Scriabin (Etudes, Preludes, Sonata).
These are the main pieces I have been developing my playing around for the past 15 years. Although I do experiement with other composers but I don't place focused consistient effort on them. I don't aim to memorise every single pieces in some of the volumes above just the ones I like sound wise and the ones which explore interesting physical playing ideas which doesn't really leave too many untouched.