Head Coach if there is no GM change

It’s been reported recently that ML plans to hire someone that he is friends with or someone he knows well. Out of the HC options that leaves Aaron Glenn, Joe Brady, and Mike McCarthy

Those are 3 decent options
I like Aaron Glenn and think he could be a really good HC. He has helped build that Detroit team from scratch, so that's a HUGE plus, IMO. And he seems to have suffered an inordinate amount of injuries on that Detroit defense, but keeps plugging in backups and winning games. The drop-off hasn't been precipitous. That sounds like good coaching to me....coaching up your backups and scheming around what THEY bring to the table. My only mis-giving about him is that he's a defensive-minded coach. That shouldn't disqualify him, but it doesn't give him the "edge" of retaining an offensive minded coach as HC for long tenure. OTOH....who might AG want to bring with him from the Detroit staff (not named Ben Johnson)? If anyone knows who the next Ben Johnson might be, I'll bet Aaron Glenn knows! But if AG picks the right guy to be his OC, we're likely to be looking for a new OC every 2-4 seasons, as the Saints OC scores a HC gig somewhere else.

The other thing I keep in mind with Aaron Glenn is his previous ties to the Jets organization, who are also looking for a quality HC. He's just as likely to be a Jets candidate as a Saints candidate, for the same reasons. I wonder what the Saints could offer that would tip the scales in our favor, if anything? Assuming he'd even be interested?