lots of great recs here, but if you want horror that is more based in storytelling and has a bit more on its mind than just slashers or gore you should check out folk horror or older horror films from the 60s/70s. as others have recommended, The Wicker Man (1973) is a must. Rosemary’s Baby (1968) is also a classic. The VVitch (2015) is also fantastic as an intro to more conceptual horror. you said you wanted deeper cuts, so check out Viy (1967) or Alucarda (1977), both of which i’ve posted more detailed recs for on my profile. also!!!! i don’t know how you feel about silent/b&w films but Nosferatu (1922) is an all-time genre mainstay that still holds up. Ari Aster’s work is great but it’s probably more gruesome than you’re looking for. have fun!!!