If you want peaceful, try the Requiems. Seriously. Very celestial.
When I paint or sculpt, it’s opera...something about it just
brings out the creativity.
When I was much younger, I dated a young man who drove me to Sugarloaf mountain, in Maryland. As we were driving up to the top, he played this on his car sound system - I had never heard it before, but it became a beloved favorite:
https://www.youtube.com/watch?v=aQxVE6d3Yj8
When we reached as far as we could drive, we got out of the car, and climbed the rest of the way, until we could sit on the uppermost ledge, and see the hawks flying very near us. I’ve never forgotten it.
https://en.wikipedia.org/wiki/Sugarloaf_Mountain_(Maryland)