The Campfire Collection: Thrilling, Chilling Tales of Alien Encounters, ed. Hyams. Yes. The final section disappoints (other than the Tiptree story, of course, which I optimistically fancy to be dated), but the rest of the stories are solid—in many cases classic—SF. I do need to check the credits to They Live, or Google for lawsuits.
Update: The acknowledgment is right there in They Live‘s credits.