Chicago canonically has sweet relish, doesn't it?I would definitely try most of them hot dogs except for the ones with the soapweed. The Coney is definitely the purest one. Potato Dog is basically the best simple dog with potato wedges unnecessarily added to it.
e: That said, not a single of one of these has any kind of relish on it, so fail
(Edit: I must have misunderstood, some others in the picture do too).