I have a combo. It’s a ninja, and is an indoor grill/griddle/air fryer.
Base heater element is the grill, griddle fits on top of that, then the fryer basket sits on top of the griddle.
I like it overall. Wasn’t sure at first (it was a gift a few years ago), but it’s been pretty good. I’ve made all kinds of shit with it. Of course as you can imagine, it’s possible for it to get a tick messy, depending on what you’re cooking.
Anyway, I’ve done grilled type stuff (brats, chops, burgers, chicken, etc), smash burgers, breakfast, enchiladas, casseroles, whatever. And that’s just the grill/griddle. Air fry stuff has been wings, corn dogs, mozzarella sticks, fried chicken, fried chops, and stuff like that.
For two, it’s really pretty good and very versatile. There’s a slight learning curve, like heating up something with a sealed cover (like a tray where you peel back a corner to vent) that can get sucked off (ha!) from the convection. So extra caution, use foil, wrap tight and poke a hole, etc.
There may be better, but this works well and no real complaints.