My current setup is a Weber Genesis II 3 burner with the side burner, a Blackstone 28" griddle, a Camp Chef SG 24 pellet grill, a Lyfe Tyme 20 x 40 double lid grill with a firebox, and a Weber original kettle grill. Sounds like a lot, but that's about a 15 year+ collection.
Blackstone - My current most used. I do everything from breakfast, fajitas, hibachi grill, fried backstrap, vegetables, loco moco, fish tacos, and cheese steaks on it. If I could have only one this would be it just because of how versatile it is.
Weber Genesis - My second most used. I've had this one 15 years on my back patio covered. All I've ever done to it is replace the flavor bars, 1 burner, and the push start. When it dies I'll buy the exact same grill.
Camp Chef pellet grill - I've only had this one a little over a year. It's okay. It's just my wife and I now so it's nice to be able to smoke something without firing up my big stick burner, but it's just not the same. What I do love it for is baking. I made a King Ranch casserole in it recently and adding just a little smoke really added to the flavor.
Lyfe Tyme pit - I've had this one 17 years and it's a stick burner. I don't know how many tons of food I've cooked in it over the years, but a lot. Love it, but you gotta be committed to an all day affair of tending a fire.
Weber kettle - I've probably cooked more meals on a kettle than any other surface and it's what I grew up cooking with. This one lives at my deer camp, but for 3 moths out of the year I cook on it every weekend. They're affordable, versatile, and last for ever if you keep them covered.