Morgog

Morgog is referred to as 'Ruler of the universe' by one of his worshipers, and presumably commands them to commit sacrificial suicide. Although we never see Morgog, Angel paints a much different picture than the worshiper obviously perceives.

"Morgog couldn't find his way to his hairy spine-hump without a roadmap! So, don't go killing yourself, he's not worth it."

- Angel