Bach's cello suite in Baroque period.
If you only listen to pop, you can listen to Bran's poems sung by contemporary orchestras.
And religious music of any era. If you type keywords related to Lord, Father and Christ in MP3 search, you will search a lot.
Some contemporary film scores have similar feelings, such as the violin music in Schindler's List and The Red Violin.
Joe Hisaishi's music is worth recommending. The male falsetto solo in Princess Ghost and the female solo at the end of Spirited Away in City of the Sky are both empty and philosophical.
If you are a patriot, the solos of Hu, Xiao and Guqin in China's music are all very tasty, and most of them are adaptations of some ancient songs. Plum blossoms are ethereal and bright, but they are hard to find. Most of the same tracks you can find are bamboo and silk ensemble versions, which have no ethereal and bright feeling at all. Then there is the Buddhist jingle, which is even harder to find. I heard the historical materials recorded by the teacher in class as an undergraduate.
If you have high artistic accomplishment and taste, I strongly recommend Mahler's Symphony No.9 and Rachmaninov's Piano Concerto No.2.. The former is the emptiness of life and death, while the latter is the deepest agitation of talent and inspiration. Of course, if you are not used to listening to symphonies before, forget it, you won't understand.