Aegon IV Targaryen (The Unworthy)

Fourth of his name. A bloated, greedy, lustful king who fathered bastards on lovers from every region of the realm and on his deathbed legitimised them all, sowing a century of civil wars to come. He hated his pious sister-queen Naerys and his brother Aemon the Dragonknight in equal measure, and his unworthiness was such that some chroniclers laid the doom of the dynasty at his feet.