Alexander the Great, Aristotle, Caesar Augustus, Cleopatra, Confucius, Constantine the Great, Hannibal, Herodotus, Homer, Jesus, Julius Caesar, Moses, Saul (Paul) of Tarsus, Pericles, Plato, Siddhartha Gautama, Socrates, Solon, and Thucydides. That’s nineteen.
In the second tier I would place Aeschylus, Aristophanes, Attila the Hun, St. Augustine, Demosthenes, Euclid, Euripides, Hammurabi, Hippocrates, Nebuchadnezzar II, Pindar, Sappho, Scipio Africanus, Sophocles, Thales, Virgil, Xerxes, and Zoroaster. Another eighteen.
My third tier would contain Archimedes, Cato, Empedocles, Galen, Justinian I Mithridates VI, Ovid, Plutarch, Ramses II, and Spartacus, making the list total 47.