Pic related is mine. Such a solid movie. From being a critique of consumerism to racism, to an action movie, to comedy at some points. And while it might not be scary in the traditional sense, the opening scenes detailing the chaos around a news station trying to remain calm during the end of the world are done pretty well and set the mood for surviving the apocalypse.
For Haloween style spooky, Creepshow. Nothing beats Creepshow for that specific kind of horror. There's spooky horror which is campy and fun and then there's scary horror which is less haloween oriented