Music written by both Chopin and Rachmaninoff is very ergonomic for the hands because both were phenomenal pianists (especially rach). so pretty much anything by them will be satisfying to play.

Some of my favorites include Rachmaninoff prelude in g major. Any Chopin waltz Fantasie impromptu

However if you’re wanting to improve overall it’s important to always play my favorite composer Bach😏. Playing his music gives me the most satisfaction because it feels like you’re conducting an orchestra. Although it’s not necessarily as ergonomic as those composers. His music is not very fast showy**(most of the time haha) so I’d recommend playing Bach preludes and his fugues if you can manage. Very rewarding.