Recommendations for 12yo-friendly horror films?

12yo is into #horror - the scarier #DoctorWho stories, #Fnaf, etc. He keeps asking about films he hears about and I keep saying no, because he *would* have nightmares after things like Aliens or It. I want him to really love them when he does see them in a few years.

I've recently introduced him to #Buffy, which he is loving. Suggestions, please, for horror films & TV of about that level?