His Philips Bach organ integral was certainly also unique for its time.
I suggest that you try the Partitas, which are the most successful of his piano recordings. Strange that his flexible style is less well suited for the Toccatas (manualiter) and the Inventions/Sinfonias,
Yet somehow I am more in love with his Suites, English and French.
Maybe it's just that the competition is so strong in Partita 1, 4 and 6 that I can't imagine frequently returning to Ruebsam's. That's rather a vulgar way to look it at of course . . .
Really creative readings of the suites on piano -- well there are some (have you heard the 2nd French suite from Richter in Hungary?) But I feel there are less of them that the Partitas.
Haven't heard his Toccatas or Inventions.
I just listened to his 4th Partita in fact -- he seems to me completely
sui generis -- unlike anyone else I know. But I'm no Bach expert.
Even if don't appreciate what he does as much as others in the Partitas, I can certainly hear there's something to respect there. He's an acquaintance I'm looking forward to developing.