[Despare]

Obviously Army of Darkness and Bubba Ho-Tep as well.
Still waiting to see slither.
Let's see, a short list of some of my favorites (some may be pushing it as horror comedy but oh well this is my list):

Beetlejuice
Frighteners
Ghostbusters (Ok so it's WAY more comedy than horror heh.)
Rocky Horror Picture Show
Braindead/Dead Alive
Bad Taste
Return of the Living Dead
Lost Boys
Versus
Re-Animator
Idle Hands
From Dusk Til' Dawn
Basketcase, Brain Damage, and Frankenhooker
American Psycho (I laughed a lot during this one.)
An American Werewolf in London
Attack of the Killer Tomatos
Shaun of the Dead
C.H.U.D.
Gremlins
Killer Klowns from Outer Space



I'm sure there are plenty more too, I feel like I'm forgetting a LOT.