6. Red Skull

In a franchise plagued with underdeveloped villains (let's be honest about this aspect of the MCU), Red Skull must be the most underdeveloped. In this way, Captain America's nemesis (portrayed by Hugo Weaving) is, basically, as powerful as the superhero. We can even say that he would have succeeded in his exploits, if it wasn't for that damned cube (and those damned writers). Why do we say that? Because he is obviously insane with power, he is ready to do anything to obtain even more, and because he is so frightening.

One more thing: he is the chief of the most powerful criminal organization in the MCU, HYDRA, which has popped very often in the franchise.

Granted, he just wants to take over the world and not over the universe. But still, this is a very ambitious plan, bolder than the one of the Iron Monger.

One more thing: he is a Nazi, so…

On the next page, the real Mandarin!