Lorewise nearly 100% of Forsaken are Priests of the Forgotten Shadow.
Goblins are kind of iffy. They reach out to the Light to help people, because they know it helps them as well. It's a little hedonistic more than altruistic, but it fits.
Gnomes and Dwarves (and Blood Elves prior to Sunwell Plateau) from a race standpoint fit the description quite naturally, but of course individuals are always the exception never the rule.