It should not include remakes. I vote for The Ring.
Nice work, dumbass.
Off the top of my head:
Cabin in the Woods
28 Days Later
Looking at a list of horror films since 1992, these are some that I've really enjoyed:
If Scream counts, then yes.
Leprechaun (not so much scary, but definitely enjoyable)
Wes Craven's New Nightmare
From Dusk Till Dawn
I Know What You Did Last Summer
Blair Witch Project
House on Haunted Hill
The first half of Jeepers Creepers
Ghost Ship (even if only for the great, great opening scene)
Dawn of the Dead
The first 2/3 of The Forgotten
The first Resident Evil
The Hills Have Eyes
30 Days of Night
The Poughkeepsie Tapes
Paranormal Activity (would be even better had the trailer not ruined the ending)
The Woman in Black
I wanted to do from 1990 on, cuz that would've included shite like Tremors and Arachnophobia, but he said 20 years..