Many will recommend Walter Gieseking as well, and you may like him but personally his interpretations do not sit well with me.
Sviatoslav Richter
I love Richters recording of ...le vent dans le plaine, so atmospheric.
Aren't there some recordings of Debussy playing Debussy. Wasn't one of Debussy's students a sort of 'passer on of secrets.' I'm trying to think of his/her name. I think it was a her. And, she taught at the Paris Conservatory.
Jean-Efflam Bavouzet's Chandos CDs are getting rave reviews from most critics. I haven't heard his Debussy recordings yet, but his Maurice Ohana Etudes CD reveals him to be a formidable pianist.
Michelangeli.