Louis XIV -- the "Sun King" -- built up the power of the French monarchy and established Versailles as the seat of government.
Louis XVI -- the king in power when the French Revolution broke out. He was first made a constitutional monarch, and then later dethroned and executed.
Robespierre - leader of the radical phase of the French Revolution, head of the Committee of Public Safety that took over control of France by "The Terror," which intimidated citizens into loyalty to the republic.
Napoleon -- military general who rose to power out of the chaos created by the French Revolution.