Raymont Baratheon

"A few of the Faith Militant's more... militant members even scaled the walls of the castle and would have slain the king and his family had a knight of the Kingsguard not intervened."

- The High Sparrow.

Ser Raymont Baratheon is an unseen character in Game of Thrones. He is not expected to appear in the show, being long dead by the time it begins. Raymont was a knight of King Aenys Targaryen's Kingsguard.

Biography
When members of the Faith Militant scaled the walls of the Red Keep, Raymont was able to keep them from killing King Aenys and his family.

Reference

 * The Kingsguard (Histories & Lore)