Try some Beethoven dances woO 8 and 13, available free
here. I enjoyed sightreading them even though my sightreading is horrendous - the harmonies are nice and repetitive so at least the LH is quite easy.

From the same website there are also lots of fairly obscure children's albums which might suit, like
Amy Beach's, as well as famous ones e.g. Schumann's - the first half of the album is meant for children, the second half is harder and meant for adults. You could also explore
Kirchner,
Burgmuller opus 100, and some
Clementi sonatinas.
I don't really have recommendations for anything jazzy or more modern - I'm just a bit obsessed with IMSLP as I discovered it fairly recently and it's amazing, especially for solving my sightreading problem as I can just print loads and loads of stuff for free!

The more recent stuff sadly isn't public domain, though.
Hope you find some things you like there.