greedyI've never met anyone so greedy for power.
avariciousHe acquired his wealth by being an avaricious, unscrupulous businessman.
rapaciousformalHe's a rapacious lawyer who will stop at nothing to win a case.
acquisitiveformaloftendisapprovingShe was ruthlessly acquisitive and often bought expensive items just to keep others from owning them.
graspingdisapprovingShe's a selfish, grasping old woman.
money-grubbinginformaldisapprovingI wouldn't do business with him, personally - he's a selfish, money-grubbing jerk.