I am an Ayn Rand novels fan.. My favorite in particular is Atlas Shrugged.
In Atlas Shrugged Ayn Rand tells the story of how a group of radicals led by a very smart and capable man change the world that has been used up by greedy, lazy, and self righteous individuals that control everything.
One can say that Dagny Taggart is the main protagonist of the novel, but others can make the point that John Galt is the true protagonist. I think it is those who the novel refers a lot but they never seem to make an appearance. I am talking about the citizens of that world.
They are the true protagonist because without them, Dagny would not have her selfless deeper purpose, John would not have anyone to save, and the story would lose its sentiment for the love of humanity and what it would take to get it back from those to attempt to own what rightfully belongs to everyone..