IIRC, M got nailed in India for saying its fries were not prepared with beef products (e.g., frying oil). The oil was tallow free, but the fries had an added coating that had beef fat as an ingredient. Just. Plain. Dumb!
On the West Coast, for a good, basic hamburger and fries, In N Out is really good. Nothing is frozen, they don’t have a freezer on the premises. If you accidentally are at the order–pick-up counter at the right time you’ll see fresh potatoes being cut into fries. Not fancy, just good.