stuartk, Good move on the Debussy selection, he is currently my 1st choice. I’m not not sure where to take you on further selections, You haven’t mentioned any other composers you may have already heard and liked or not. Personally I listen a lot to the well known greats, Beethoven, Brahms, Chopin, Liszt, Prokofiev, Ravel, Schubert and Schumann (and of course Debussy). If you have any interest in these composers I’ll be happy to recommend some specific pieces/performers.
A little off the beaten path but music you might enjoy is music by Scriabin and specifically performances by Maria Lettberg on the Capriccio label. Next, for something a little different but very interesting music by Gottschalk. Think Cuban. I listen to Philip Martin on the Hyperion label. For something big and bold, try Rachmaninov. His Preludes are a good place to start. Lots of pianists to go to but musically speaking Ashkenazy is a good place to start. Old recording on the London label and includes in addition to the Preludes, Sonata #2. Antigrundge2 mentioned Prokofiev. Two recordings that are easy to start with are on the Harmonia Mundi label and performed by Frederic Chiu - "Transcriptions" in Vol IX and Romeo and Juliet etc in Vol IV. If you like Bavouzet I think you might like Chiu.
Have fun, lots of stuff out there to hear. :-)