Well... my opinion could change when we learn amore about Mikael, because as far as we now about him (nothing) he could be some other original creature, like Klaus.
I think Original vampires are pretty much the bosses.
But then again, it sounds like the witch/es who lived in the Originals era were THE bosses of errrthing, keeping the balance in nature. I think this Original witch could kick SO much ass (hybrid ass, vampire ass, werewolf ass, human ass, witch ass, ghost ass) if she were still alive. Well, she kinda kicked ass a little in 3x06... lol.