The Marvel Illuminati is a fictional secret group within the Marvel Comics universe. It consists of some of the most powerful and influential heroes and leaders in the Marvel Universe. The members of the Illuminati typically include characters like Iron Man (Tony Stark), Doctor Strange (Stephen Strange), Black Bolt, Namor the Sub-Mariner, Professor X (Charles Xavier), Reed Richards (Mr. Fantastic), and sometimes others like Black Panther (T'Challa).
Their purpose is to deal with global threats and make difficult decisions for the greater good of the Marvel Universe, often involving matters too sensitive or dangerous to involve larger superhero teams. They have played significant roles in various Marvel storylines, including events like "Secret Wars" and "Infinity."
Please note that the composition and activities of the Illuminati can vary in different Marvel story arcs and series.