The Kinder's fry and burger sauces are pretty damn good. They're kinda tangy, with a hint of spice on the back of the tongue. Whataburger fries are really good in it.

I posted on another thread similar to this one, where I worked in a sports bar where we made our own Nashville hot sauce and that stuff was the bomb on our fries. Mixed with a little bit of ketchup (about 60/40) and it was absolute gold.

You can never go wrong with a ketchup/ranch mix. I've never tried the premade stuff, but Red Robin's ranch mixed with ketchup is really damn good.