5. New Orleans Saints
Glenn has been regarded as the favorite for the Saints' job going back a but, with McCarthy seemingly joining him as a co-favorite now.
The Saints carry plenty of red flags. Their salary cap deficit heading into the offseason is an annual thing ($57.74 million in the red right now, according to Over The Cap, in terms of effective cap space). Tony Pauline of Sportkeeda also recently reported long-time Saints general manager Mickey Loomis would prefer to keeps several coaches on the existing staff, and Glenn was believed to be open to that. The idea of keeping several existing assistant coaches should actually be a huge red flag for Glenn, or any head coaching candidate.
It's unclear how much Glenn covets the Saints' job. But he should leave aside connection he has from his time as an assistant coach there, and keep his options all the way open.
4. Chicago Bears
It seems the Bears would (should) prioritize hiring an offensive-minded head coach, with developing quarterback Caleb Williams as the organization's clear No. 1 priority over anything else. But they also may not want to pigeonhole themselves that way.
The Bears are in a good position in relation to the salary cap ($54.5 million in effective space right now), and they have eight picks in April's draft to add more talent to a roster that is not barren.
The Bears need a culture setter and a leader of men as much as a coach, and Glenn can be that. If he can get the right offensive coordinator to come with him, Chicago could be a good fit.
3. Las Vegas Raiders
The Raiders apparently have serious eyes for Lions offensive coordinator Ben Johnson, and they are doing all they can to give him what he wants. But the clean slate they can offer to Johnson can be offered to any head coaching candidate, with ample draft capital (four of the top-75 picks, 10 picks overall in this year's draft) and lots of cap space (the second-most in the league right now).
The Raiders tried to buy into the Antonio Pierce was a coach who could set their culture in the right direction. Glenn would seem to be similar on that front as a culture-setter, except he can actually coach.