Best recordings of Debussy piano music......

As suggested above: Moravec and Jacobs are both wonderful in
presenting Debussy's music.

The various Jacobs recordings on the Nonesuch label were
recorded by the team of Teresa Nickrenz and Marc Aubort.
They are superbly recorded.

Moravec made at least two recordings of Debussy piano music
for the Connoisseur Society label in the 1960s. These were
produced by Alan Silver and are some of the best piano
recordings available, notwithstanding their age. One of
these LPs (CS 2010) was re-mastered and reissued by Athena
Productions in a superb sounding pressing. If you ever see
the Athena ALSY 10002 reissue LP, get it.

And, Michelangeli made a very special set of Images I & II
for DGG. Well worth hearing.
.

If you want to go more old school, you might be able to find Walter Geiseking's recordings of the Debussy Preludes on the "burlap" Angels, the mono ones.

Have to "fifth" Paul Jacobs on Nonesuch, not only for recording, (and wonderful Lp's mastered at Masterdisk), but also for the performances--wonderful gleam and glint, but no skimping on Debussy's (somewhat under-acknowledged) "romanticism." Gorgeous piano sound, much like Moravec's Chopin Nocturnes.