So, you need a badass to round out this pretty little group? I hate playing stereotypically, "combat," oriented characters, but given the circumstances and my sheer love and adoration for your setting... 

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Name: James Butler, "Wild Bill," Hickok. 
Archetype: Gunslinger. 
Race/Ethnicity: Anglo-Saxon. 
Religion/Culture: 
Appearance: 

Background: 

Skills:
Talent: (What your character is best at. In game terms you will only rarely fail doing this thing. Can not be 'Being Awesome' )
Flaw: (This is what the GM uses to fuck with you )
Motivation: (Why do you fight?) 

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If this concept piques your interest let me know via PM, and I'll work out a historical fiction cannon with you. 

(Confession: ever since watching Deadwood I've always wanted to roleplay as Wild Bill. Never thought it'd happen, but hey, sometimes life surprises you.)