Some have already been mentioned (Bartók, Szymanowski, Rameau, Medtner...) and I know I'll have to leave out quite a few for now, but here are some that come to mind, along with a couple of their works:
• Frederic Mompou: Frederic's music is, in my opinion, very much of the kind that Philip Hale refers to in his biographical sketch of Bach to the WTC:
"As William Cart well says, this chaste Muse shuns the "screaming" light of the concert hall, nor will she speak to the jaded ears of a crowd indifferent, or greedy for startling effects."I'll refrain from posting his "Música callada" here, since I recently included that one on another post by lelle, but I find these just as awesome:
• Enrique Granados: Perhaps not that underrated, but I still find him on concert programs less often than I'd like.
• Leos Janáček:
• Walter Niemann:
• Leopold Godowsky:
• Pablo de Sarasate: Not sure if Pablo belongs here, but sometimes it just seems to me that all most people know of his works is the "Carmen Fantasy", and yet there's plenty more that's really good.
• Alessandro Scarlatti:
There was an even better version of this one some years ago, but you know, You Tube happened...🙄 :
• Ignaz Paderewski:
Sorry, lelle, I know you asked specifically for piano works, but I just couldn't help squeezing in Sarasate and Scarlatti.
And since they have been mentioned, too, might I add these, as well?
Horowitz's offhand dismissal in this one of his wife's and one of the film's producers "No" to his asking if they want the Moszkowski never fails to crack me up 😁👍🏼 :