Urgathoa

Urgathoa is the Neutral Evil Goddess of Excess/Gluttony, Disease and Undeath from the Golarion setting of Pathfinder. Sort of a more hardcore take on Evening Glory, the demigoddess of Undying Love from 3.5's Libris Mortis. Urgathoa earned her divinity by being the first mortal ever to reject the rulings of Pharasma and forcibly shackle her soul to her rotting carcass out of a sheer mad determination o keep enjoying life's pleasures. This made her the first undead, and thusly a full-fledged god, but also caused her to bring plague to the world. The Excess/Gluttony thing came about because she is, as you probably guessed, a huge hedonist.

Needless to say, Urgathoa's worshippers are an eclectic bunch of master necromancers, plague victims, people praying to be spared the ravages of disease, hedonists, cannibals, necrophiliacs and sapient undead.

She's not popular with most of the deities in Golarion, but she is particularly opposed to Pharasma. This, incidentally, makes her one of the few deities who can be seen as allied with Zyphus, who shares a similar motivation to topple Pharasma and replace her carefully woven tapestry of fate.