Which type? Horror has many sub genres! Just to get started, try the classics: The Shining, The Exorcist, The Universal Monster Movies, ect... Or try some modern ones: Hereditary, The Witch, Conjuring
Let us know what type of scares you're looking for and we can throw some titles out!
Depends on the type of scary you like. For instance, A Quiet Place is hella scary. But it may not be your cup of tea. So is IT chapter 1. If you like the big monster kind of scars, few can rival 2014's Godzilla. I'm hooked on short horror films these days though. Check out Crypt TV on youtube!