• The Exorcist (The Version You’ve Never Seen)

I've never seen this version? But I have read the book and eugh. It's horrible in a sort of losing bodily autonomy way.

• Hereditary (a masterpiece in my opinion. Free upvote literally every time I see someone recommend it)

This one sat with me for a long time and I swore immediately after watching it that I would never watch it again. And now I absolutely love it. There are a few bright moments that really freak me out, but the tension and build up is so good. Chef's kiss to this one.

• Blair Witch Project

Haven't seen!

• Paranormal Activity

One of my favorites! I know this one gets dragged for being campy(??), but I think the original did an excellent job of building suspense and dread.

• Ouija: Origin of Evil

Mike Flanagan is one of my favorites and this one is a lot of fun. Not as high in my list as others, but still a good time.

• It (miniseries got me as a kid but Chapter 1 is good too)

I need to rewatch the miniseries, but I wasn't a huge fan of the more recent movies. I think the actors were all great (especially for Pennywise), but it felt like it was trying too hard? Pt 2 seemed to realize they'd never match the book and it ended up being more funny than anything.

• Lights Out (not the entire movie but it has its moments and overall a good style)
• Candyman (original)
• Poltergeist (original)
• Autopsy of Jane Doe (another poster reminded me of this one!)
• The Taking of Deborah Logan (for like one scene but IYKYK)
• The Dark and the Wicked
• The Orphanage
• Terrified and When Evil Lurks were both solidly unsettling at least

These are all being added to my list!

• Event Horizon (though I know you didn’t like this one)

Bleh. Lol

• Conjuring 1-2 and Sinister too, all at least solid spookies.

Love these movies. I would add the first half of Insidious as well.

As for my list - I'll throw that in a separate comment soon enough :D