Not many rules for this. They just only have to have directed 2 or more films.
These are in no real order.
Adam Green Writer/director of
The Hatchet Series, Frozen, Co-Director of Spiral, Chillerama (Diary Of Anne Frankenstein story) Writer/director, series creator and co star of the TV show
Holliston
Eli Roth Writer/director of
Cabin Fever. Hostel and Hostel Part II Co star in Inglorious Basterds and Aftershock. Along as co-writer. Also the Writer/director of the upcoming film
The Green Inferno
Rob Zombie Writer/Director of
House of a 1,000 Corpses, The Devil's Rejects, Halloween, Halloween II and The Lords of Salem
Wes Craven Writer/Director of
The Last House On The Left, The Hills Have Eyes The creator of
Freddy Krueger The Writer/Director of
A Nightmare On Elm Street, Shocker, The serpent and The Rainbow, The People Under The Stairs And Director of the
Scream Franchise

Okay, I'm cheating a bit here.
James Wann The Director of
SAW, Dead Silence, Insidious, The Conjuring and Insidious: Chapter 2 next to
Darren Lynn Bousman Writer/Director of
SAW II, Only directed
SAW III, SAW IV, Repo! The Genetic Opera, Mothers Day (Remake) Also Wrote/Directed
11-11-11 and The Barrens Next to them is Writer/Actor
Leigh Whannell From
SAW, SAW III, Insidious and Insidious Chapter 2 he also wrote the first
3 SAW films along with the
two Insidious films with James Wann
And while not really what I call a Horror director, but I do like their work
James Gunn Writer of
Dawn Of The Dead 2004 Also the writer/director of
Slither, SuperAnd next year's [B[Guardians Of The Galaxy[/B]
Now i know everyone has their likes and dislikes. So let's try to be civil in here if someone posts someone you don't like or think is horrible, okay?
You can also post videos of clips/trailers from a directors work you like.