McD fries are always good and you can eat them with one hand right out of the cup thing (or whatever it's called) while driving.
Wendy's has been consistently great but recently they don't seem as good as they did in the past. Still good, though.
Red Robin steak fries are my latest favorite but I always ask for them with no seasoning.
Saddest of all is that I have to limit my carb intake now so maybe only one order of fries per month for me (and I have to make sure no one sees me!)
Sigh.