Nickey's gyros and dogs on Roosevelt east of Finley, in Lombard. Gyro sandwich.
Right next door, el Famous Burrito (chain) for veggie burrito.
Chinese Kitchen off Ogden and Royal St. George, in Naperville is not quite fast food, but darn good carry out.
Great burgers at Your Neighbors, in the Bobak's plaza off 75th and Rickert, Naperville. Good chili in the winter.

John78 - Giovanni's for ribs?