I see that Russian Piano Music vol. 2 is due for release shortly and is devoted to Rebikov (1866-1920) of whom I have recently begun an exploration. One composer who comes to mind here is Satie and, although differing in many respects, I would rate Satie and Rebikov on a par. Perhaps if Rebikov's music were to find its way into some commercials he will rise to a similar fame. Playing pieces such as Op13 Tondichtungen and Op14 Petite Suite de Ballet makes one immediately think of 'minimalism' with phrase repetition with subtle variation in a whole tone setting. I don't have a date for these but they are probably sometime before 1900.
I have a date with 'Ésclavage et Liberté' (Op22) - the first of the composer's tableaux musical psychologique.
Not as good as Satie IMO, but the man could write a catchy waltz!
YouTube offers many of his short piano pieces: here is a longer work for (it would seem) two pianos.
https://www.youtube.com/v/8CvI_HwlfvE
Sometimes though, Rebikov claims the palm!