Hello, mine would be with few doubts Robespierre. The french revolution is probably still one of the most debatted period of the history about its impact. Maximilien de Robespierre is often considered as a monster, the artisan of the terror. He is a strange personnality, he fought slavery, he plaided to against death penalty but voted for the king's death and had some responsibilities in the terror (but far the most of them). He was too really lucid and voted against the war, because he didn't thought that revolutionnary ideas could be spred through violence and it would made those ideas being hated (the deep anti french feeling in Europe will make him right) and because he feared that a general would become a dictator. With Saint Just, he was one of the personnality of the revolution who wasn't involved in any corruption affairs. And even if they hate them, some royalist admit his deep honnesty. He is today depicted as the main villain of Assassin Creed, and i's probably unfair.