So I'll lead it off....
I would pick Ben Johnson.
I think an offensive coach who can develop Maye is the key to becoming a true contender, and Johnson is an elite offensive mind. I also think there is some downside protection there.... most coaches, whether new or re-treads fail, BJ will likely fail, Vrabel will likely fail, the roster is going to be a huge factor. I trust Johnson to develop Maye more than I trust anything else in this cycle, so even a failure in record will provide long term benefits.
Also though... I think BJ is one of the best new candidates in years, he's an elite offensive mind, players talk about his ability to identify, and explain schemes in the kind of glowing terms guys talk about Belichick. He has run a room for a number of years in DET, and has significant experience in a variety of staffs and organizations.
Staff buildout....
For OC, I'd let him pick whomever he wants but here are the top candidates to me...
Tanner Engstrand - current QB coach in DET (might get the OC job there)
Anthony Lynn- Johnson worked under him in DET, not a great playcaller, but BJ has said he will call his own plays... respected older coach, was a HC at one point, lot of experience running a room, culture setter.
Darell Bevell- Similar to Lynn (though never a HC)
Bo Hardegree- a QB coach mostly, was here briefly then worked under Josh McDaniels in LV.
For DC- tougher to figure out.
John Fox- worked together in DET briefly, a senior former HC to lean on, disciplined
Dom Capers- long-shot, worked together at times but he's probably too old to want a DC job full time.
George Edwards- former MIN DC, they overalapped, currently LB coach in TB
Lou Anarumo- not a huge fan of this, but they overlapped, Anarumo has been DC In CIN for years
Frank Bush- on the same staffs in MIA, was briefly a DC in HOU now a LB coach
David Corraro- current OLB coach in DET, he and Johnson also worked together in MIA
ST-
Darren Rizzi- current interim HC in NO, supposedly they are pretty close meeting in MIA
Front office-
I think bringing in John Dorsey in some role makes a lot of sense, Krafts want to keep Wolf in some role to continue the re-structure. Dorsey and Wolf spent a lot of time together in GB, and later Dorsey hired him in CLE as his Asst. GM, Dorsey had a good run with the Chiefs, making some of the key moves (including Mahomes) that set up their dynasty.