No. Wakka has never and will never be classified as a Ranger. Does he have an animal companion? No. Does he like nature? No. Does he not have a dumb haircut, weird accent and a blue and white ball that he carries around with him everywhere including to bed and the washroom? No.

Though I do have to praise him for the fact that he can deal up to 99,999 points of damage to a monster with a plastic(?) ball. Like please.