Ed, a 245/75R16 load C (with appropriate tread) is an ideal size for excellent Winter road traction and I personally think is good off road for XJ, ZJ, TJ and all smaller Jeeps.
Some people will debate this, but many people say a more flexible tire has better traction than a stiffer tire. I have experienced this to be true. So load C is not only lighter, better riding, less rolling resistance (better gas mileage) than D or E, but C also offers better traction IMO.
In my experience, load C are plenty tough enough for a Jeep, especially in better brands
You can run 245/75R16 on 16 x 8 Moabs, but a 16 x 7 Silverstar or Icon would be a much better choice for 3 reasons: A 16 x 7 is lighter, protected by tire, and will hold a bead much better if you need to air down.
The narrower wheel is protected by tire sidewalls, which prevents wheel rash/chips from curbs when parallel parking and rocks off road.
If you need down some time, the 16 x 7 will hold a bead well with 245/75R16 tire.
By contrast, as 16 x 8 is unnecessarily heavy and to wide for the 9.5" wide tire. The 16 x 8 wheel will more easily get dinged by rocks because the wheel is wide relative to tire width. Also, the wide wheel with narrow tire combination can lose a bead when aired down.
The ideal wheel/tire width relationship for on road and general purpose off road use is wheel 2" to 2.5" narrower than tire section width.
So a 7" wide wheel with a 9.5" wide tire is ideal. A 245 is 9.5" wide. So a 245/75R16 tire on a 16 x 7 wheel is an ideal tire/wheel setup, and the 245 tire (or any 9" to 9.5" wide tire) is ideal for Winter roads.
An 8" wide wheel is ideal for a 10" to 10.5" wide tire. So a 16 x 8 is ideal with a 265/75R16 load C tire because that tire is 10.5" wide.
However, a 265 (10.5" wide) tire is not as ideal for Winter roads as a narrower 245 (9.5" wide) tire. A 265 would be good for Winter roads, but a 245 is better.
Perhaps I didn't explain the above well enough before.
I realize tire store specs for tire/wheel width possibilities are more permissive than what I said, but that's because they want to sell tires. So they tell the OK range for on road, but the aren't going for ideal, and they aren't thinking about off road issues like airing down and holding a bead or damaging a wheel on a rock.
I also realize that rockcrawlers like the wheel around 4" to 4.5" narrower than tire. Like an 8" wide wheel with 12.5" wide tire. That is so they can air down really low and hold a bead, and to protect wheel from rock damage. (Wide sidewalls stick way past narrow wheel) However, putting really wide tires on relatively narrow wheels causes several problems, such as can't get flat contact patch at a reasonable street pressure, which wears out center of tire prematurely and greatly reduces Winter road traction. Also, wide tires are already not good for Winter roads, then the crowned tire tread (not flat contact patch) reduces Winter traction even more.
The things I recommend are intended for a daily driver that drives on highway a lot and does general purpose off roading on a variety of terrains, and I always setup for Winter roads too. I'm about daily drivers for Northern USA and Canada. Since I'm in Northwest where hills, wet snow, and wet ice (wet is slickest) are common, I take Winter traction seriously.
Warning: I often edit my posts a few times to get them complete or correct errors.