Artur Schnabel. He doesn't have any recordings that stand out from the rest, because he's just always so insightful and resourceful. However, he's particularly known for playing Mozart (if I'm interpreting right, the composer he admired most), Beethoven (first time all 32 sonatas were on record), and Schubert (helped garner more of a public appreciation for his sonatas), so from those composers, I'd go with:
Mozart - K 333 sonata - lightweight sonata that Schnabel allows to sing out rather than the typical one-dimensional, "happy" Mozart stereotype
Beethoven - Op 110 sonata - excellent tone in the 1st mvt. His recording made it my favorite Beethoven sonata.
I'm not the biggest fan of Schnabel's Schubert (even though Schubert's my favorite composer and Schnabel's my favorite pianist) so I'll put his Brahms Concerto 2. If I understand correctly, this was a favorite earlier in his life and he mentioned it in his autobiography. Much more energetic than most performances today.
Of course, all of these pieces are pretty long, so you can do whatever you want with them. Where's your YouTube channel, by the way?