Jin Yong had this odd idiosyncrasy wherein it seemed like half of his protagonist heroes were missing in action/unaccounted for at the end of their respective stories. Let's look at the tale of the tape:
Accounted For:
Siu Fung (committed suicide)
Deun Yu (King of Dali)
Hui Juk (Prince Consort of Hsi-Hsia Kingdom and Leader of Siu Yiu Sect)
Gwok Jing (perished at Seung Yeung Fortress)
Unaccounted For:
Yeung Gor
Cheung Mo Gei
Ling Wu Chung
Wai Siu Bo
Others: Yeun Sing Chi, Chan Ga Lok, Wu Fei