User blog:Legolas halfelf/Silmarillion questions

The Valar
Ever since I have read the Silmarilion I have been puzzled about why manwe is the king of the valar. Personaly I think Ulmo (the king of the sea) should be the lord seeing as water is in everything whereas Manwe is lord of air wich is nowhere near as powerful as water. Please can somebody tell me Tolkiens motives for making manwe the king of the valar?