I believe Morbius was "evil" in the sense that the Punisher was as well. Both were Spider-Man villains of the 70's whose bloodthirsty tendencies put them at odds with the wall-crawler. The characters themselves, however, saw themselves as essentially good and, being "interesting" mixed-morality types, starred in self-titled series in Marvel's black-and-white magazine line. They were conflicted and violent, yes, but still "heroic" enough to rate their own books.

At the very least then, Morbius pre-dates Hannibal King. And the concept of the sympathetic vampire goes back at least as far as the first "turned" victim.