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.
grabbyinformalWe wouldn't let my grabby cousins visit after my mother died for fear they'd walk off with anything not nailed down.
money-grubbinginformaldisapprovingI wouldn't do business with him, personally - he's a selfish, money-grubbing jerk.