I'd add The Humans, by Stephen Karem. It's a grim forced-reunion Thanksgiving play set in a lower Manhattan two-tier basement duplex that manages to make suburban domesticity threatened by an urban environment something palpable. Much goes on, the neighbors are mysterious presence, and yet very little. Adultery is revealed, and mysterious doings happen around the core event. But it created an ominous atmosphere that captured something frightening about such family gatherings.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling