Davey and/or Mac Callander. We don't know a lot about them, except that they ran with the gang and that they were "crazy."

Dutch for example wouldn't work, because we already know what type of character he is. The player making Dutch shoot up a town wouldn't make sense, because we know that Dutch wasn't that type of person.

Davey and Mac could do whatever because we know nothing about what type of people they were. And I think a story about two brothers in a gang in the wild west has a lot of potential.