I know we could all just post our favourite songs here, but if you are specifically asking for music that brings about a sense of “wellness”, spiritual fulfillment even, I would urge any readers to stop what they’re doing, find a quiet place, use some good speakers or headphones, and turn up the volume on the following:
The Lark Ascending (Composer Ralph Vaughan Williams). My favourite rendition of it is performed by the Academy of St Martin in the Fields, conducted by Neville Marriner, with Iona Brown doing the solo. ( Link: https://www.youtube.com/watch?v=tzONNtE_WqM )
It doesn’t matter what style of music someone likes, whenever they hear it, they ask what it is. It’s like somebody picked some remote piece of English countryside at dawn and distilled it.