Well it was hard to find a less likely candidate than many being listed. I'm still not sure I succeeded.
Vince Lombardi and George Halas have been contacted from what I've heard.. Hell Ditka was seen at Baton Rouge airport eating a polish tiger dog.
The Titans aren't in the playoffs, no reason to wait on him unless the rumors of the candidates team still playing are false. Plus his last 30 years coaching have been on the offensive side. The last time he coached defense was 1986.