I get what you're saying with a re-tread type option such as Quinn. And honestly, he might be at the top of the list as far as previous HC's go. My caveat to that - most likely these guys can 'stabilize' the team, but are going to be mediocre at best. Hovering around 6, 7, 8 wins is football hell in the NFL. Not really good enough for the playoffs and stuck picking in the middle of the draft every year. So, to acquire that game changer type talent, you have to give up draft capital and this has repeatedly fucked the Bears the past 5 years.
I mean, if you're going to be bad you might as well be really fucking bad. And when you are as incompetent as the Bears you just hope and pray they luck into a generational talent. So, if they take a flyer on a younger guy and he doesn't pan out its likely to be an epic failure (Nagy, Flus) and you at least have high draft picks.