I for one love horror movies and any good movie that fits a holiday/season/theme particularly well. “Halloween” is the elephant in the room I’d like to address. I’ve seen it too many times, so I’m not watching it again. Maybe a newer Halloween but not the OG. Anything along the lines of Trick R Treat(I love that one) or Jennifer’s Body, Robert Altman’s Images, anything that fits a good fall/Halloween vibe. What movies come to mind?
The Thing (1982) if you haven't seen it.
John Carpenter was just a great director IMO and did some very interesting stuff to say nothing of the politics of many (but not all, some are just movie fiction) movies being better than 95% of Hollywood.
I also like classic horror though it's not always scary but often interesting. Nosferatu (1922), Haxan (1922) are two of my silent favorites though I warn you Haxan is more an honorable mention as it's a pseudo-documentary about witchcraft.
Though I will say I don't view horror as something scary so I'm in it for the humor, ambience, camp, etc. I love Vincent Price stuff for example. So if you're after gore and killers The Thing is about the only one from my list that probably fits your interest. It's isolating, it's claustrophobic, it's people being stalked, etc.
I'd say Scream (1996) is pretty good but you've probably seen it, it's a great send-up of slashers and I really enjoy it.
Definitely agree on Alien/Aliens as being really good though.
You cannot mention a 1922 mockumentary about witchcraft and then say it's an honorable mention. I need to find this now.
It's on 1337x or rarbg for those who sail the high seas. Don't go for the lousy youtube copies, you want the restored criterion version with proper color tinting, it makes a world of difference. Rutracker also has a bluray rip of it, 20-ish GBs in size though of course.
I also believe it is on HBOmax right now.