Actus Tragicus BWV106 hasn't been mentioned or if it has I missed it. My copy is from German Harmonia Mundi which I've owned for 30 years. It never fails to move me, it is pure treasure. I read that the recent French Harmonia Mundi to compact disc is "warm and beautifully detailed" on the BBC. You will hopefully add it to your library and listening. Different performers from the one I own but beautiful, beautiful and moving music. If this was the only thing Bach ever wrote he would still be a saint to me.