“I want the sword. The sword of Godric Gryffindor.” -- Griphook (DH25)
Griphook was a Goblin who operated the underground tram which takes wizards to their Gringotts vaults (PS5). Griphook assisted in the break in at Gringotts to steal the Hufflepuff cup Horcrux from the Lestrange vault (DH26). Harry promised to give him the Sword of Gryffindor in exchange for his help (DH25).
Griphook died by Lord Voldemort's hand after he stole the Sword of Gryffindor from Harry Potter.
Cunning, direct, willing to steal for his "rightful" goblin-made objects.