I too was brought up on only classical music, pop was for much later, when the wireless was traded for a transistor! I love the exquisite emotions, the complicated entwined tunes, the cascade of voices. I absolutely love church music of the baroque period, the the romantic period.
So, in no particular orders: -
Just about anything by JS Bach
Spem in Alium; Dido’s lament - Thomas Tallis
Rachmaninov - vespers; piano concerto no. 2
Eternal light of Love Divine - GF Handel
Piano concerto no. 2 - Stravinsky
Piano concerto no. 1 - Maurice Ravel
That’s for starters…