I don't know if Cowher would be the right choice.
He has more playoff chokes than championships (yes, he has a Super Bowl, but let's not forget the other postseason letdowns his Steelers had- how about 4 AFC Title game losses at home?)
AND he will more than likely demand the power to "buy the groceries" as Tuna calls it. IF you are asking of him to coach the team..that would be a pretty good choice...but to be ALSO a gm/president of player personnel ...that is different.