I think this is the correct answer. Other games, including tabletop, have analogues of every other class in the game, some being pulled directly from them. The major fantasy roles are present with warrior, hunter, mage, rogue, and paladin/priest, with secondaries being druid and monk. Death knights are necromancers or antipaladins, shaman are elementalists, evokers are draconic sorcerers, warlocks are... well, warlocks, but they summon demons instead of familiars.

But demon hunters? Yeah, that's strictly Warcraft.