Game Of Thrones: 10 Most Powerful Characters Going Into Season 7

10. Olenna Tyrell

Olenna Tyrell - played with tremendous spikiness by Diana Rigg - is one of the great verbal warriors of Game of Thrones, with few characters capable of going toe-to-toe with her in a war of words.

However, there's a lot more to the head of the Tyrell family beyond having razor-sharp wit. She's an incredibly shrewd operator who wins the game without people even realising she's been playing.

Her house's lineage has effectively been destroyed, so her long-term prospects aren't great, but heading into Season 7 she still holds a lot of power. The Tyrells have a huge army and one of the strongest fleets in the realm, are super wealthy, and have command of the Reach, a key area of Westeros. Furthermore, Olenna has lent her support to Daenerys Targaryen, and is hellbent on revenge against Cersei.

That said, though, as opposed to some others whose power in Westeros will reside because of their affiliation with Dany - even Tyrion, given his reputation in the Seven Kingdoms is mud - Olenna can stand apart; she needs Daenerys, but Daenerys will also need her, and that helps her make the list ahead of the likes of Tyrion and Varys.