Vignar Gray-Mane

Vignar Gray-Mane is a family member of the Gray-Mane clan in Whiterun. He is a strong supporter of the Stormcloaks. He is known as "Vignar the Revered" to The Companions.

He seems to be the oldest member of The Companions, Kodlak suggesting that he witnessed the rise and fall of half a dozen Harbringers.

Promotion to Jarl
Vignar Gray-Mane takes over for Jarl Balgruuf the Greater as the Jarl of Whiterun, if the Dragonborn helps the Stormcloaks take Over Whiterun in The Battle for Whiterun.