Bahamut

Bahamut, the Platinum Dragon also referred to as The God of Dragons or the Lord of the North Wind, is a powerful dranoic diety and the King of the Good Dragons. Bahamut is a child of the dragon god Io.

Description
Bahamut is depicted as a massive dragon with platinum scales and blue eyes, the exact color of which is hard to specify and may depend on Bahamut's mood.

Tiamat & Bahamut
Bahamut's antithesis is Tiamat, the Chromatic Dragon and Queen of Evil Dragons, as well as the mother and deity of all evil dragons.