I love horror movies I am a...self proclaimed connoisseur (jk)... Let's see my list...
The Ring (2002): 10/10
Insidious series: 8/10
The Grudge (2004): 7/10
Oculus: 6/10
It (2017): 8/10
It follows (2014): 8/10
Get Out (2017): 7/10
The Witch (2015) : 0/10
Hereditary: 3/10
Veronica: 0/10
Silence of the Lambs (1991): 9/10
Candyman (1992): 6/10
The Game (1997): 8/10
Gone Girl (2014): 10/10
The Lady in Black: 5/10 Not scary
Zodiac (2007): 8/10
Spotlight: 7/10
The Devil: 7/10
Mean Girls (2004): 10/10
Copycat: 7/10
Room 1408: 2/10
Shutter Island: 3/10
Prisoners: 4/10
Unfriended: 7/10
Clueless: 8/10
The Descent (2005): 6/10 TOO scary
2012: 8/10
The Day After Tomorrow: 7/10
Speak (2004): 9/10
Us (2019): 5/10
Halloween (2018): 10/10
Sinister (2012): 6/10
Autopsy of Jane Doe: 8/10
Se7en: 8/10
World War Z: 7/10
10 Cloverfield Lane: 7/10
Matrix series: 10/10
The Shining: 7/10
Nightmare on Elm Street: 8/10 (scary)
Twister (1996): 6/10
Titanic: 9/10
Case 39: 7/10
Those are some of the main ones I remember for now... I'm sure I've seen more but hmm..