Furgr

About

He was the chief of the Ogre race and their representative at the Ten Lords Assembly in the Dark Territory in Underworld.

(Source: Sword Art Online Wiki)

Anime

Supporting Sword Art Online: Alicization - War of Underworld

Supporting Sword Art Online: Alicization - War of Underworld Reminiscence

Manga

Supporting Sword Art Online: Project Alicization