StanleyStutters
Member
Well, all extras who died during a battle clash slaughter, such as Stannis' army X 2 (lol), the Moat Cailin ironmen, the northmen killed at Harrenhaal, the Lannisters killed in the north/Riverlands, red wedding soldiers, the wildlings and NW men killed by wights and whitewalkers, etc.
As for named characters that actually died off screen, Stannis Baratheon, Selyse Baratheon, Khal Head in a Bag, Syrio Forell, Jon Arryn, Benjen Stark possibly, Ros although you see her body, Xaro Xhoan and the whore traitor in their vault. I'm sure there are more.
Syrio is the best example. We never saw his death or body, but with Trant still being alive (at the time) it seems Syrio did die there.