Richard the Good?

Richard II, Duke of Normandy, was the eldest surviving son of Richard I and Gunnor. We don't know his birth date, but when his father died in 996, Richard was young: the first five years of his reign his uncle Rodulf of Ivry was regent along with Gunnor. (Richard's grandmother, Sprota, married after the death of his grandfather, William Longsword; Rodulf was the son of Sprota and her second husband, Esperleng.)

In the early 11th century, Vikings started plundering England and then crossing the English Channel to sell their goods on the continent. Richard welcomed them, which angered England. Richard's father had signed a treaty with King Æthelred II (the Unready) that Normandy would not aid the enemies of England. Æthelred led an attack on the Cotentin Peninsula that Richard was forced to repel. Æthelred tried to have Richard captured and brought to England, but the Normans successfully prevented this.

Richard tried to make it up to Æthelred by offering his sister, Emma, as a bride. It was a great idea at the time, but down the road the arrangement would lead to a justification for William of Normandy in 1066 to...well, you know that story already.

Later, when Sweyn Forkbeard (father of Cnut) intended to attack England, Richard made him welcome in Rouen and made an alliance with him. The attack forced Emma and her husband to flee to Normandy, where Richard also sheltered them.

Wanting to amend his reputation and that of Normandy, Richard commissioned his confessor, Dudo of Saint-Quentin, to write a history of Normandy, rehabilitating his ancestors and making them seem more noble and Christian than they were in their time.

After reigning for three decades, Richard died, leaving the title to his son, Richard III, who signed 49 weeks and died childless. I'll tell you about him next time.