I’d be leery of Johnson. He could be Nagy 2.0. He’s done a great job as OC but Campbell leads the team and takes most of the pressure off Ben to just focus on his job.
Nagy didn't design the O nor call plays in KC outside of 2 questionable games. He was a glorified passing game coordinator that got a lot of steam due to a strong endorsement from Ried when it was hot to hire HCs that fell off that tree. He was the next Doug Pederson.
Johnson is his own man and earned every accolade he's given. He hasn't fallen off any particular tree and is a self made commodity. May be why he's hard to pin down tendency wise.
Detroit went from 25th to 5th in scoring from '21 to '22 when Johnson was promoted to OC. His WRs were DJ Chark, Amon-Ra St. Brown, Josh Reynolds, his RB was the same one we had this year and only 2 of his current OL were starting. His O performed almost identically with lessor players and before he was responsible for 'fixing' Goff who has clearly become a more competent QB this last year. He's now a QB you can win because of instead of with and that's on Johnson. Ask Goff.
The only guy you know can 'lead men' are Vrabel who will rotate OCs and Carroll who's 70. I respect Vrabel but it appears he wants to coach at NE and vice versa and is only using the Bear for leverage. Don't tell me you want McCarthy.
Anyone else and you don't know how they manage an NFL locker room. College HC is not at all the same as Pro HC and strong figures like Flores have already show to be, err, too strong.
Do the interviews and pick the best O guy that you know can develop your most important and record influencing commodity, that you also believe can both relate to the players and keep them in line. Finding reasons to not hire any of these guys will leave you without a HC as they all have real or imagined negatives.