Protector of the Realm or no,
he who holds the king holds the kingdom.
Game of Thrones Season 1, Episode 7
Seems like you don't need a PROTECTOR.
Game of Thrones Season 7, Episode 2
Protector of the Seven Kingdoms.
Game of Thrones Season 6, Episode 10
Lord of the Seven Kingdoms
and Protector of the Realm,
Game of Thrones Season 1, Episode 6
the Lord of the Seven Kingdoms,
the Protector of the Realm,
Game of Thrones Season 5, Episode 4