No No and No on Coughlin.
The only way I would want him; if it guarantees Rivera leaves.
Yes he's one two Superbowls, But he's too inconsistent. And his players have either loved or hated him.
Obviously, they love him, when they're winning. When they don't he becomes intolerable (though he claims he's adjusted).
I think the Panthers (and Cam), need someone a bit younger, more dynamic, and with fresher ideas.