Gorgol

"Old Sauron bade me bring it back, and yet methinks, he has no lack of weightier treasures in his hoard: the greater the greedier the lord!"

- Gorgol on keeping Barahir's ring for himself Gorgol also called the "Butcher" was an Orc captain and a minor antagonist in Beren and Lúthien.

Beren and Lúthien (Silmarilion)
"So mark me, mates, ye all shall swear that Barahir's hand was bare!"

- Gorgol to his Orcs on keeping the booty they took from Barahir's body Gorgol was an Orc in the service of Sauron and a captain in Morgoth's army. He was sent to lead his soldiers in an attack upon King Barahir and his Men. After slaying them, the Butcher took the monarch's ring and cut of his hand, before asking his comrades to swear before their master that Barahir's hand was "bare". Beren however slew him and recovered his father's ring before fleeing from the Orcs.

Beren and Lúthien (2017)
Gorgol was an Orc in the service of Morgoth and a captain of his hosts. He was sent to lead his soldiers in an attack upon King Barahir and his Men. After slaying them, the Butcher took the monarch's ring and cut of his hand, to prove to his lord the feat and be rewarded. Beren however slew him and recovered his father's ring before fleeing from the Orcs.

Other versions
In earlier versions the character of Gorgol doesn't appear at all. In other versions he is sent to kill Barahir by Morgoth himself and not Sauron, while in the later versions he is loyal to Sauron and he plans on bringing the ring of Barahir to his master so as to prove his feat and possibly be rewarded.

Appendices
"Gorgol - the Butcher an Orc slain by Beren