Who is a great leader to write a leadership paper on?

Winston Churchill. Dag Hammarskiold. Olof Palme. Charles de Gaulle. Kemal Ataturk. Mahatma Gandhi. Queen Victoria. Queen Elisabeth I. King Gustaf II Adolf of Sweden. Primeminister Chamberlain. Nelson Mandela. Abraham Lincoln. President Washington. John F. Kennedy. King Louis XVI of France. Alexander the great. Pharaoh Ramses II. Julius Caesar. Octavius/Augustus. Queen Nefertiti. Just a few names I could think of now there are many many more.