While I do appreciate it that you posted an entire new topic about a subject we already discussed to death, instead of necro-bumping this months old about the exact same thing. It was still better for you to just wait until Playtonic reveals the main villain(s), probably at the end of this year. But I'll throw my two cents of what the villain will be like anyway for the lack of new Yooka-Laylee info we could discuss instead.
If we assume that this is the main villain's face carved into a mountain in this piece of concept art of him (her? Haha). I say it's some form of humanoid magic-user. Maybe a warlock?