18. Maester Aemon

The Grand Maester at Castle Black and brother of Aegon Targaryen, making him the Mad King's uncle, and Daenerys' great uncle. He joined the Night's Watch to get away from the politics of Westeros. Maester Aemon was one of Lord Commander Mormont's closest advisors. He was always loyal to Jon Snow and Samwell Tarly.

Time of death: Season 5, episode 7, "Kill the Boy"

Cause of death: Old age

Sadness ranking: 7. His death was somewhat expected since he was so old, but he'd been with us since the beginning and helped Sam get his confidence.