Weber trio op. 63! *Very* beautiful but very difficult to play. It's worth

Philippe Gaubert "Three water colours" consisting of "On a clear morning" "Autumn evening" and "Serenade"
I have played all of these and enjoyed them very much

Gaubert has written more for this combo, just do a search, his works are edited by Southern Music Company, San Antonio, Texas.
Then there is a pretty challenging trio by Bohuslav Martinu which I haven't played but I think it's very good.
There are more. I can't find my handwritten list at the moment

And yes, the Hummel op 78, but that one is mainly for the pianist. Well, nothing wrong about that of course

but the others are more for all three instruments equally