Seriously, I am thankful some are not the GM on this team because if you are seriously going to base a candidate off of where they coach then you have no idea how to find a HC.
Again, just because a coordinator coached on a team that wasn't in the playoffs doesn't mean that they are bad coaches or would make bad HC. I can give you a couple examples:
1) Mike McCarthy (GB)- Was the offensive coordinator with Mike Nolan in SF and his offense in SF was ranked last in points scored and yards gain and btw, all with rookie QB Alex Smith. Now with the GB and consistently bringing GB in the playoffs.
2) Mike Smith (ATL)- While he kept the Jags defense strong, the team, on the other hand, only made the playoffs a few times during his tenue as DC.
Point being, how about actually giving these guys a shot before shooting them down.