Head of the noble House of Lannister, Lord Tywin was feared and respected by all. He was known for betraying the Mad King Aerys Targaryen in support of Robert Baratheon's rebellion. He always put the interest of his family over everything else. Although he was not physically abusive, his manipulative actions to make the Lannisters as the power behind the Iron Throne has caused unfortunate events to others.

"Like father, like son" seems appropriate for Roose Bolton's character. He is the sociopath father of Ramsay Bolton and one of Robb Stark's most trusted advisors. It was until he betrayed the House Stark by stabbing Robb to death to seize the powers for himself. Little did they know that behind his calm and pleasant demeanor, Roose is a selfish man thirsty for power and violence.

Euron Greyjoy, if not one of the evilest villains, is perhaps the most egoistic character in Game of Thrones. He is the naval commander of his own fleet of ships who believes that he is the reincarnation of Ironborn's Drowned God. He killed his own brother, Balon, to seize the crown and throne. He even tried to seduce Cersei Lannister to be the King of all of Westeros and he is also the man behind the death of Daenerys' dragon Rhaegal.

Petyr Baelish who goes by the name of Littlefinger is a manipulative and devious childhood friend of Catelyn Stark. One of his most notable acts of treachery was when he betrayed Ned Stark to the Lannisters. This ended up to the beheading of the leader of House Stark. He even tried to seduce Catelyn and Sansa but he ended up marrying (and killing) Catelyn's sister, Lysa Arryn.

Ser Gregor Clegane or The Mountain is famous for his sadism and brutality. To name a few of his heinous crimes, he raped and murdered Princess Elia Martell and killed her two infant children and he ordered the execution of hundreds of Harrenhal prisoners. In one of the most significant scenes, he gouged out the eyes of Prince Oberyn Martell in a duel before he crushed his skull using his bare hands.

Walder Frey is a lustful old man who collects young women to be his wife. He is one of the villains who orchestrated the death of Robb Stark after the young Stark left Lord Frey's daughter to wed another woman. This evil plan resulted in the bloody slaughter known as the Red Wedding.

The High Sparrow is a cunning man who almost deceived his way to the Iron Throne. He became the leader of the Faith of the Seven and he tried to con Cersei Lannister. Unfortunately, this ambitious betrayal only brought death to his character.