i did lots and lots of alignments.
one time i had a car come in with a "pull" it was alignd IN SPEC (nothing wrong), test drove it, still pulld.
i actually atempted, (by sugested by me boss) to counter the camber to offset the pull. (angle the wheels inproperly)
it still pulled.
turns out another reason for pull, and problly yours too, is the rack has lost a seal, as in rack an pinion steering. you're probly gonna need a new rack put in to fix it.
a way to confirm this.... jack the front off the ground. (jack stands) start it and the sterring pump will feed the rack. if the tires turn you've got a leaking seal.
other unmentiond items are bent body, bent suspension parts