I just replied to a post listing a load of horror. I will paste it here below for reference.
Halloween The Evil Dead Night of the living dead (1968 ver) + the remakes. Psycho (1960's) + remake American Psycho house on haunted hill the wax house Friday the 13th Nightmare on elm street Texas Chainsaw Re-Animator Silence of the lambs it rubs the lotion on its skin or else it gets the hose again Phantasm Chucky The Ring Scream I know what you did last summer The Purge Final Destination Hellraiser
that should be more than enough to keep you going, these are in no particular order, just as they came to memory. there are many more and spin-offs from a lot of them, and quite a few have 7 or 8 sequels. there is also a new Halloween movie coming, but it looks like its going to be the final one to finish off the franchise.