List of French Rulers they could have used In Civilization VI
Napoléon : Fought against the whole of Europe and somehow won for a decade, founder of the modern legal system in most of Europe, made the metric system popular - used in most preceding games.
Louis XIV : Fought against most of Europe and fared okay, made France the cultural center of Europe.
Jeanne d’Arc : inspiring military leader of the Hundred Years War, despite being a teenager - used in Civilization III.
De Gaulle : leader of the French Resistance during WW2, decorated tank commander, founder of the Fifth French Republic - used in Civilization IV.
Clovis, aka Louis I : semi-mythical first king of the Franks, unified most of France and the Netherlands by fucking them up, first Christian Frankish king.
Charlemagne : first Holy Roman Emperor, leader of the Carolingian Empire that covered France, Germany, the Netherlands and received tributes all the way from the Middle-East.
Philippe Auguste : first King of France, consolidated it into a centralized power with a strong king, defeated the German English and Flemish armies at the battle of Bouvines, didn’t even give a shit about helping his son become king of England.
François Ier : Leader of the French Renaissance, renowned warrior.
Henri III : killed his assassin with his own shit-covered dagger.
Instead we have
Catherine de’ Medici : Italian noblewoman, Queen-consort then Queen-regent, known for effectively keeping the house of Valois aka Henri III on the throne of France long enough to get stabbed, due in no small part to her poor handling of the Protestant Reformation and the consequent Civil Wars. The house of Valois was then replaced by the house of Bourbon. Portrayed in French media as a crafty foreigner.