Personally I believe very few people to be actually evil, but it's a question of definition. To me, you need to be deliberate to be evil. E.g. Elon Musk isn't evil (I think), he's just insane. Peter Thiel might actually be evil, because his actions are deliberate and planned. Zuckerberg also doesn't strike me as evil, just incredibly socially inept (and maybe dimwitted).

But no, you're right, it doesn't have to be one or the other.