Hildegard von Bingen. Partly because she was a truly fascinating woman and partly because this is the music I listen when I wish to clear everything out of my body and mind and replace that with lightness and joy. It's not the religion behind the music that speaks to me but the praise and the glory of the pure sounds.
This video has some chatter at the very end, sorry.
Vision of Hildegard von Bingen, voice Hana Blochova-Kvinterna