If "murderhobo" was an army, I think it'd be the Warhammer Age of Sigmar Ogor Mawtribes. These monstrous gluttons are interested in one thing: eating and fighting. Well, that's two – but in my defense, they're one and the same thing for these horrors.
The mechanics of the Mawtribes' overindulgence force me to really play up to that idea, which ends up the perfect marriage of theme with gameplay. Everything about the Ogor Mawtribes is designed to make them hit hard and chow down harder, with combat often allowing your troops to take literal chunks out of other Warhammer Age of Sigmar armies. They're utterly disgusting, and that really helps them stand out from their rivals.