In no particular order:
Alex "Civil War" Garland: Annihilation (Adapted by), Men
Jordan "MadTV" Peele: Get Out, Nope, Us, Him
Ari "Eddington" Aster: Hereditary, Midsommar
Robert Eggers: The VVitch, The Lighthouse, Nosferatu (Adapted by)
Zach "WKUK" Cregger: Barbarian, Weapons
David "No, not THAT one" Mitchell: It Follows, Under the Silver Lake (probably more of a 70s paranoid thriller than horror)
Osgood "I mispelled it in the image but I'm not fixing it" Perkins: Longlegs, The Monkey (Adapted by)
Julia "Heir to the Cronenberg kingdom" Ducournau: Raw, Titane
Panos "I did it before it was cool" Cosmatos: Beyond the Black Rainbow, Mandy
To me most of these are okay. I feel like Alex Garland made Men to do social commentary like Peele. I feel like Aster made the aptly named Midsommar to do folk horror like Eggers. I think The VVitch is the best of Eggers' portfolio. The Lighthouse was too indulgent and Nosferatu felt too commercial. I enjoyed the novelty of Weapons but it felt very much like an Aster movie. It Follows predates a lot of movies on this list and I like UtSL just for the conspiracy stuff. I enjoy Perkins "Gretel and Hansel" way more than longlegs and I think he works better as a director than a writer.
I have not seen Raw or Titane, but I hear Doucournou is good with body horror. Beyond the Black Rainbow is another movie that's older than the rest and I liked it. Stranger Things ripped it off so hard I'm shocked there was never a lawsuit. It's much more experimental and stylistic than Stranger Things. Mandy was a dud imo. But we have to keep Nic Cage employed so I understand.