Red Robins is pricey, but if you get the upgrade for garlic fries, it still qualifies as unlimited. Before corona though, they started skimping out on the amount of fries in your basket though. Like, yeah it's unlimited, but it's not even half way full, so you'd have to ask for them to refill it frequently.
In N Out is fresh and the price is right, but wayyyy overrated tbh. It got hyped up by everyone and when I finally tried it, I was disappointed. It's a good value, yeah, for sure, but best tasting? Meh.
Mirroring the others that said Five Guys. Pricey, but GOOD.