The first one I discovered on Radio Swiss Classical (which if you haven’t discovered yet, you should check out. There’s also Radio Swiss Jazz. Both have no commercials and just play music.)
Not all classical music contains moments of sublimity, but when they do, there is something that aligns perfectly with something in the soul, a suspension, a discord, that resolves in a divine perfection.
Tchaikovsky’s Sacred Choral Music is that way for me. I didn’t even know he wrote sacred music. Most people love the Nutcracker Suite, Swan Lake and Romeo and Juliet, and his 1st Piano Concierto. But these 9 Sacred Choral pieces are magical. I became addicted and couldn’t stop listening to them over and over.
The second recommendation is Gabriel Fauré’s Requiem in D Minor. Unlike the previous, these are set to music. Fauré was an organist so it figures prominently. I love especially the final movement, In Paradisium, which you may recognize.