p.1 #3 · Carry Case for Nikon 200-500 F 5.6 plus D850
I use the Thinktank Backstory 15. It holds the 200-500 plus the 70-200/2.8, 1.4Xiii, one body, batteries, cards, etc. (I am all mirrorless now and can actually get 2 Z7ii's plus the FTZ, plus the Z 1.4x in there as well with room for the accessories, but not sure it would take 2 D bodies.) You do need to pull out the thinner side divider set if you want to haul a second larger lens like the 70-200. You can leave it in or re-shape it for smaller lenses or other accessories. It's also a great travel bag for a couple bodies and smaller lenses. Best of all, it does not look like it has expensive camera gear in it
p.1 #4 · Carry Case for Nikon 200-500 F 5.6 plus D850
I use a Think Tank Glass Taxi for that exact combo and the fit is perfect, almost as if it were made for it. It works with or without a grip on the D850 as well. My goal was to find the smallest bag that would fit that combo and not much else. There are plenty of larger bags that will fit that combo + other lenses but that wasn't what I was after personally.
p.1 #6 · Carry Case for Nikon 200-500 F 5.6 plus D850
The perfect bag for my D500+500PF was the Think Tank Glass Limo. It was perfect for that combo and I didn't need to reverse the hood. It is now also the perfect bag for my Z9+500PF+FTZII and still don't have to reverse the hood.
I have that and still have room for 3-4 other smaller lenses or a 70-200 in the bag. It is perfect to fit under an airplane seat and narrow enough to fit 2 side by side under the airplane seat.
p.1 #8 · Carry Case for Nikon 200-500 F 5.6 plus D850
I would say the glass taxi. The limo is bigger, maybe bigger than is needed. I have both, use the limo for my 600mm f4 and the taxi for my 500pf with body attached. Both are superb bags.
