You wouldn't need to ban as much Chopin as you might expect. It may come as a surprise to many pianists that Chopin wrote more than two nocturnes. (Op. 27/2 and Op. 48/1 aren't the only ones!)
It may also come as a surprise to many that the Preludes don't need to be played complete and can be interspersed with these things called waltzes. There are also some impromptus that aren't hackneyed (3 in fact!)
No, it all has to be banned, just because it's by Chopin. He's one of the few composers I know of whose music is so grossly overexposed that even if I had never heard a piece of his before, if somebody started playing it, I'd think, "Oh, no, not more Chopin." The particular piece no longer matters, the composer's style in itself has achieved over-saturation, regardless of which piece is in front of you.
I also get that stylistic over-saturation effect with Mozart, Vivaldi, Mahler, Shostakovich, and very intermittently, Brahms.