Namor is a King of the Atlantis and the Seven Oceans and represents the antihero mindset.
Tony Stark represents the Avenger type of hero, one who understands and appreciates that a hero can work with the government, rather than outside of it. He also represents the common man, as he possesses no natural superhuman abilities.
Reed Richards: Leader of Fantastic Four. Represents the science-based part of the superhero community.
Black Bolt: King of Inhumans, who are an important part of Marvel history and play an important part in events that have not yet come to pass. He also represents a ruler/king archetype, one that has also been filled by Namor.
Doctor Stephen Strange: Sorcerer Supreme of Earth. speaks for the mystical/non-scientific side of the Marvel universe.
Professor Charles Xavier: Leader of the X-Men is there on behalf of the mutant community.
Black Panther King of Wakanda... and the idea that they form a government of superhumans.