My "pantry" consists of 2 metal shelf units in my attached garage. Only stuff in cans/jars so not attractive to any critters. Out there, I ALWAYS have plenty of tomato products... sauce, crushed, whole, home-canned. ALWAYS have good tuna... imported, solid, in olive oil. Canned soup... only Progresso. Either have MANY cans of kidney beans or NONE... when I want them??
In fridge... ALWAYS carrots & celery. Don't care what "they" say... these 2 things can last a LONG time in fridge. In freezer, ALWAYS chicken, ground beef, sausages... all vac sealed so they don't get freezer burn. When bacon is on sale, I stock up.
In kitchen, ALWAYS have sugar (white & brown), flour, onions, bread crumbs. Almost NEVER buy bread crumbs... my grandmother always had a big bowl sitting somewhere with the old bread. Once DRY, she'd run it thru one of those grinders that clamped on to edge of table/counter.