As mike in nc said, I can't give you just one - I have too many to choose from, maybe far too many. But just to be a little bit obnoxious, you mentioned Gould and Bach. If you want to hear a modern recording of the Goldberg Variations by a young and excellent pianist, you should hear Beatrice Rana's version on Warner Classic's. My preferred version of all available to me. :-)
FWIW one CD that gets a lot of play time from me is a compilation of very assessible but more modern (20th century) 'classical' music. 'Michael Sheppard plays Rogers/Hough - Barber/Sheppard Crumb Corigliano Wild Bolcom.
If you can drill down your request to either composers, composition, or performers I, and others I think, could give you many specific recommendations.