Honestly, even the 'easier-sounding' works for piano and cello will be pretty hard for the pianist. It's just the way with chamber music. The Swan from Carnival of the Animals by Saint-Saens sounds lovely and is one of the easier accompaniment parts to handle. Also try 'Elegie' by Massenet-same thing...well-known, lovely piece, not too hard piano part.
Moving up on the scale of difficulty and musical worth, there are 5 lovely sonatas by Beethoven, one by Chopin, and one by Rachmaninoff. Two by Brahms. Real virtuoso stuff.
My best advice would be to pick up Suzuki Cello books 3,4, and 5. There should be plenty of great, easy-ish pieces in those volumes!
Good luck! I love to play the cello!