Using the console to become immortal is the only way to go.
The only good vassal is a Craven, Content, Humble, Imbecilic dwarf with five children in a gavelkind.
The Holy Roman Empire has always had France as a de jure kingdom.
Brittainy took over Ireland and Wales by 1250 and began working on Scotland by the 1300s.
Iberia is one big soup of a land mass. That Spanish March was wonderful at keeping the Muslims and Cathars in there.
Ottoman Turks took over the Byzantines? No, no, no... it was the Seljuk Turks! Turns out getting a Homosexual, Craven Empress is bad PR for vassals.
The Crusader States never were founded, and if they were the Sunni Caliphate took them over.
Pope Innocent the VII was a Mongol, don't you read your history?