When I was living in Switzerland, and buying LPs, I bought several on the luna label featuring a Swiss pianist, Michael Studer, in standard repertoire (Chopin, Brahms, Schubert, etc) - his interpretations are outstanding, in my view, and deserve a wider audience. I don't know if they have ever made it to CD.
In Messiaen, I think both Peter Hill and Anatol Ugorski are outstanding in the Catalogue d'Oiseaux, with interpretations that are quite different from each other.
Noriko Kawai, particularly for her recording of Dillon's The Book of Elements.
In Scriabin, Evelyne Dubourg's recordings on the Tudor label are excellent and a match for the better known pianists.
He's much better known, but I'll also mention John Ogdon's recording of Sorabji's Opus Clavicembalisticum as the work is quite obscure. Fredrik Ullén's recordings of Sorabji's Transcendental Etudes are also very much worth listening to.
There are several others whose focus is more on contemporary music, and I may mention some of them when I have more time.