Steiner would work best as someone's bodyguard. I recall some stupid idea of having Mason Ryan be someone's bodyguard... y'know, that guy who's pretty muscular but facially looks like a complete doofus and has no idea how to act intimidating. Don't have Steiner say very much, but have him prone to getting in people's faces like a chained pitbull. Have him beating people down and with the look he's got(minus the stupid chain mail hair net), it'll look fairly convincing.
Unfortunately Johnny Ace is gone, he could've been Ace's bodyguard.