Hans Joachim Rodelius of Cluster and Harmonia , etc. 84 yrs old and a fantastic keyboardist . Super nice guy as well. His piano playing owes a lot to Jarrett (well that’s what I heard) but he was a synth pioneer and that entire Krautrock scene was years ahead of its time and sooo influential. I occasionally put on this or Neu or Can for people and ask them to guess the year and they’re always off by a decade !