OP
Do you know anything about Classical Music? Your OP specifically mentions vinyl.
To me this implies that you know something about Classical Music, that this knowledge was acquired by other means (digital, radio, or performing it), and that you are wondering what is available specifically on vinyl.
However, I suspect that what you meant to say was: 1) I only listen to vinyl 2) I know nothing about Classical Music, and what should I try?
I suggest spending some time listening to a Classical Music Radio station to see what strikes your fancy. Then perhaps stream a few different versions of the music you like, after identifying which recordings are available on vinyl.
I could sit here all day and make specific composer recommendations, but it is a wide genre, and I am clueless as to what might light your fire