Joe Cobb

 is the leader of a group of escaped convicts that make up one of the local powder gangs in 2280.

Background
He is looking for a man named Ringo, who has taken refuge at Goodsprings.

Interactions with the player character
The player can assist him in attacking a town, or kill him and save Goodsprings from his gang.

Appearances
appears in Fallout: New Vegas.

Trivia
The name "Joe Cobb" is likely a refrence to the character of "Jayne Cobb" from the Television series Firefly, which takes place in a similar SciFi/Wild West setting.