You mean like the god-servant Exarchs in 4E? Well, if we choose to disregard the 11 million adventurers running around Azeroth (and Outland), we have a whole lot of powerful "people", including the goddess Elune, the three (or two) sane Dragon Aspects, the Naaru, the racial leaders (especially Velen, probably on par with Kil'jaeden and Archimonde)... The only hope the Exarch has is to release one or two Old Gods, alert the Titans, and hope for a nice cleansing apocalypse.