Runcel Hightower

Runcel Hightower 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. He was a Lord Commander of the Night's Watch.

Biography
When Runcel was Lord Commander, he tried to bequeath the Night's Watch to his bastard, and his since been remembered as one of the worst Lord Commanders in the history of the order.

Reference

 * "The Lord Commanders"