I'm with Larry on Pollini's recordings of Schubert's late piano sonatas. I return to them more often than any of Pollini's other recordings. I think they're extraordinary.
OTOH, for me, Pollini's Chopin is just too objective, too "steely." Just my preference, of course. I much prefer Rubinstein, Moravec, Michelangeli, et al.
NP:
JS Bach: The Art of the Fugue / Hermann Scherchen, Vienna SO, et al.
Scherchen made these arrangements. They're not at all HIP, but they are supremely musical.