A sturdy roasting pan with a rack is what you want for the turkey, a roast chicken and a tray of crispy potatoes. Buy one heavy enough to make the gravy in.
Ceramic baking dishes go from the oven to the table looking lovely. Lasagna, crumbles, mac and cheese, gratins: a set of three sizes covers almost everything.
A pizza stone soaks up the oven's heat and gives you a crisp, blistered crust that a baking sheet just can't match. It's wonderful for bread and flatbreads, too.
If I could keep only one pot, it would be a heavy Dutch oven. It sears, simmers, braises and even bakes bread, and it goes from the stovetop to the oven to the table.
A sauté pan is a frying pan with straight, high sides and a lid. It sears like a skillet and holds sauce like a pot, so it's my go-to for one-pan dinners.
Stainless steel is the pan chefs reach for. It browns beautifully, it's happy on high heat, and it leaves behind the tasty bits that make a proper pan sauce.