Hadn't heard of Cobb before, and have just googled it. It looks great as an oven/bbq, but a bit of a pain for the sort of camping cooking we do, which is cups of tea, pasta, rice, etc. Quite bulky too?
We use a Trangia with meths, a whisperlite multi-fuel, and a camping gaz burner. Yes, you have to keep the kids away, but that's going to be true of any cooker. I like that the trangia packs up so neatly, pans and all, and you can buy meths anywhere. Not very controllable, pretty much on or off, but resilient in windy weather. Our meths burner has seen better days, so we're thinking of getting a gas burner for it.
The whisperlite is lovely - simple and can even burn petrol if you're stuck for other fuels. Very controllable heat. Quite compact, but separate pans needed.
I find it hard to prime this one though, and tend to get a puddle of fuel everywhere. DH doesn't have this problem.
The camping gaz one is very easy to use, and we have a lamp fitting for it too, can swap the gas over. But we tend to use this in more urban situations, as it's relatively bulky, and you need to be sure you can buy more gas somewhere nearby. These are wee gas canisters, about 6" high, not the big things.
Mostly, we take 2 of these 3 options, using the whisperlite or camping gaz one for boiling kettle, and using the 2 when making a meal, using the trangia as a simmer ring - it's slower for boiling than the other two.
Hope that helps somewhat. Perhaps Cobb plus something like the whisperlite would work for you?