Iron Fist belongs to Marvel. He has his own unique story and powers within the Marvel comic book world, and has also appeared in related media adaptations.
Iron Man's fate varies in different Marvel Comics story arcs. But in certain ones, unfortunately, he does die. It often depends on the creative direction and plot developments.
There are a few versions of the Iron Fist character in Marvel Comics. But it's not a straightforward number as it depends on different storylines and continuities.
The highest god in the Marvel Universe was OUA (One-Above-All), who was considered an all-powerful cosmic existence in the Marvel Universe. OAAAs were existences that transcended everything and controlled the power and order of the universe. He was one of the most powerful beings in the Marvel Universe and was regarded as the highest existence of all gods. However, this information was not explicitly mentioned in the search results provided, so I cannot be sure of the accuracy of this answer.