What is the highest ranking user of light magic

In World of Warcraft only 2 classes use Holy Magic: the Priest and the Paladin. Since the cap on character level is presently 70 (to go to 80 with next expansion pack), the 'highest ranking user' of Holy Magic would be a level 70 Paladin or a level 70 Priest. As to strength, the Holy Priest has more efficient and stronger heals, the Paladin has better attack abilities against the Undead; both of which require Holy Magic to be used.