I personally think it's extraordinarily unlikely that we'd land either Brad Stevens or Billy Donovan, but if we were to do so, that is just such an unfathomably incredible hire it's difficult to even put it into words. Two guys with multiple national championship game pedigrees at the collegiate level (BD won two back to back, BS appeared in two back to back), two guys with great experience coaching at two of the most premier NBA franchises, two guys who would basically get a blank check from the donors. It's just really, really hard to see either of them actually wanting the job. You obviously have to make them say 'no' either way. But these two are "bottom of the 9th, Game 7 of the World Series, trailing by 3 runs, with 2 outs, and a 3-2 pitch, walk-off grand slam" type hires, IMO.
After that, I think Tommy Lloyd and Dusty May are the next two home run type hires. Both have phenomenal coaching chops at the collegiate level, both lead major programs and are used to the limelight, and both have demonstrated a propensity for thriving in the current NIL, transfer portal intensive roster building environment. Personally, I don't think either of them would necessarily find UNC's basketball program to currently be a better job than the one that they each have. Obvsiously, historically it's not even close- UNC is far and away the better program- but in this day and age the national title banners and the retired jerseys hanging in the rafters of the Smith Center aren't doing any heavy lifting other than being nostalgia for fans. It is exclusively about money- your program either has enough or it doesn't. In that sense, UNC is not heads and shoulders above Arizona and Michigan, and may not even be ahead of either at all.
I think after that, and assuming it's true that none of Nate Oats, Todd Golden, or Fred Hoiberg are going to be candidates, I think that guys like TJ Otzelberger and Mark Byington are the most *realistic*. I'd be mostly pleased with TJO and ever so slightly underwhelmed with Byington, but would feel like UNC has at least landed good, solid hires with definite upside but also definite potential pitfalls.