Apparently I'm bad at detecting sarcasm, so sorry if you're not serious but...
Aragorn healed exclusively by using herbs, and failed to heal Frodo of his wounds from the Morgul blade. Elrond Half-Elven was the one who used magic to heal Frodo.
Again, Aragorn had elven blood... diluted by millenia of breeding with humans. The line of Numenoreans was descended from Elrond's mortal brother, but after thousands of years he was almost completely human.
Plus, the Paladin in D&D is a holy knight, where Aragorn fought primarily on foot. The ranger, which is equally tied to Divine magic, is much closer to his capabilities and background. Plus, he was literally a Ranger; one of the Rangers of the North.