I'm a big fan of the Atlas/Seaboard titles in general, but I especially love Planet of Vampires, a completely unoriginal mash-up of Planet of the Apes and I Am Legend, with a title cribbed from a Mario Bava film, and elements seemingly borrowed from Charlton's Doomsday+1 comic. Four American astronauts - two married couples - return to Earth after a space mission to discover that, in the aftermath of a nuclear war, Earth is now ruled by technological vampires who survive on the blood of human survivors.
The first two issues, written by Larry Hama and illustrated by the astounding team of Pat Broderick and Frank MacLaughlin, are awesome, with lots of post-Apocalyptic action, an incredibly high body count, and a surprisingly grim tone. The third - and final issue - isn't quite as good (like all Atlas titles, the book self-destructed early), but does feature some gorgeous art by the legendary Russ Heath.
This first issue cover was penciled by Broderick and inked by Neal Adams.