I've just been re-reading Stranger Things and it's brought another fic to mind.
I know that it's spander and i'm fairly certain that it's a consort fic. Spike and Xan move to LA but while they were in Sunnnyhell Graham became obsessed with Xander. He conviced himself that Spike was forcing Xan and that he had to 'rescue' him. He was stalking Xander and even wound up following them to LA.
I think that Angel may have lost his soul at one point and tried to bring the family (including Xan) all together. I also think that Angel was in a relationship with Doyle. Though I may be getting two different fics mixed up.