Alien/Aliens is a given for most people. I have been watching Event Horizon during the spooky season for years. What are some of your favorite books and movies with a horror/psychological thriller lean?
Prospect (2018, movie) - It steals all the cool you associate with crunchy sci-fi short-stories, and gets away with it. Beautiful, lovingly detailed interior sets. Sparse exposition, leaving your snatching at any little turn of phrase or namedrop wondering if it's world-building, or just how the characters talk. Just the right length. Respect for not making it Yet Another Miniseries (YAM (this is my acronym, you'll never see it again)).
Also wow, I haven't read any reviews until now, and I'm glad I hadn't. If you like sci-fi just watch it. It's 1 and a 1/2 hours long. I've already told you too much.