It's a tie between KFC and Arby's for me.
Especially since KFC has their 5 buck boxes now! Three chicken tenders, mashed potatoes with gravy, a biscuit, a cookie, and a drink!? That's the best deal I've ever seen at a fast food place EVER! I mean, it costs more to just get a Baconator at Wendy's!
Arby's because their mozzarella sticks are the bomb, curly fries are the best fries, and roast beef and cheddar sandwiches! Those sandwiches are heaven on earth!