Original thinkers:
Voltaire, Benedict Spinoza, F. Nietzsche, Francis Bacon, R. Descartes, Leonardo Da Vinci, A. Einstein, I. Newton, Pythagoras, Socrates, Lucretius, Alan Turing. I am sure I am missing many, these are the one that came to mind first.
Humanitarians: Albert Schweitzer, Gandhi, King Leonidas
Great leaders and politicians: Abraham Lincoln, Caesar Augustus, Alexander the Great, King Cyrus, Winston Churchill.
Group of people/nation state/city state: the classical Greeks of 5th century Athens