I recognized the Dunwich director's name, Daniel Haller, but couldn't remember why. He directed another of Corman's Lovecraft adaptations, Die, Monster, Die! (with Karloff - based on "The Color Out of Space"), a childhood favorite of mine.
I think I'd always wanted to see The Shuttered Room back in the day, but it never happened. My viewing of it on DVD might have been my first time.
Of course there is also Corman's The Haunted Palace, the Poe-titled Lovecraft story. That's a favorite, too, in part due to Ronald Stein's score.