28. Genghis Khan
The Great Khan founded the Mongol Empire which, after his death, became the largest contiguous empire in all of history. The Mongol Invasions that he initiated terrorized people from Asia to Europe, even prompting the construction of underground cities so that people could hide until the danger had passed. As he requested after he died his body was buried in an unmarked grave. For Mongolians, a true mark of honor is proof that one is a descendant of the Great Khan.