William, the duke of Normandy: 1048 to 1060
Although you can install garrisons in Mayenne and LeMans, you never get the sympathy of the country at large. When the time comes for you to raise an army to invade England, Maine hates you and offers you only further conflict, not troops. Your future cause will be unreachable without the full support of your neighbors. Because you hold the lands of your neighbors with a bloody, iron fist, history knows you only as William the (bloody) Bastard.