4. Roger Ashton-Griffiths
Mace Tyrell, the father of Margaery and Loras Tyrell, was played by Roger Ashton-Griffiths. Mace might not have spoke much in Game of Thrones, but that didn’t mean he wasn’t one of the most powerful men in all of Westeros. Powerful, that was, until the High Sparrow took over and his gold didn’t matter all that much anymore. Mace also died during the wildfire explosion at the Sept of Baelor in Season 6.
The actor, however, is just fine and has gone on to star with Jonathan Pryce in FX’s series, Taboo. His career won’t be ending any time soon.