greedy — excessively or inordinately desirous of wealth, profit, etc.; avaricious: the greedy owners of the company.
marauding — engaged in raiding for plunder, especially roaming about and ravaging an area: marauding bands of outlaws.
rapacious — given to seizing for plunder or the satisfaction of greed.
voracious — craving or consuming large quantities of food: a voracious appetite.
bloodthirsty — Bloodthirsty people are eager to use violence or display a strong interest in violent things. You can also use bloodthirsty to refer to very violent situations.