There aren't that many "always evil" creatures that aren't devils/demons/etc, and Rich is on record having stated that those are indeed always evil, because they are not so much independent beings as much as embodiment of their respective planes. That leaves the undead, which (since they are animated with evil energy) are fighting a stacked deck to be not-evil. I was hoping that Malack would be shown to be Neutral, actually (it could have been done, with an appropriate back story), but of course the latest comic has put that to rest.
There is also RC's words on the undead, although RC has been known to be in severe denial, so I don't take his words on the topic too authoritatively.
Edit: I had no idea that Enor, whatever he was, was "always evil"
Grey Wolf