Which level 7 creature is the best, and why?

It's strange that people are still arguing about whether Archangels are far from being the best (in terms of stats) and that some other unit will outperform them – it's just silly, and the question of personal preferences wasn't even raised! Personally, I prefer "Ancients," but I'm not going to argue that Archangels are stronger – it's a fact! Even though their price is astronomical, they are still worth it...