9 Game Of Thrones Warriors Who Could Defeat The Night's King
4. Brienne Of Tarth
Not only is Brienne one of the greatest warriors in Westeros, she also happens to have a nice big Valyrian steel sword to hand. Brienn's mainly been concerned with keeping her oath to the late Caitlyn Stark, but if and when the Walkers make it past the Wall, she must surely be seen as one of the prime candidates to wipe that evil smile off the Night's King's face.
The honourable (to a fault?) Brienne clearly enjoys collecting vows and promises, and with Stannis dead there's a spot open on her itinerary. Sure she'll probably have another scout around for Sansa, but if she isn't able to put her hand to the Stark girl Brienne might decide to head north and look into what befell her half-brother at the Wall.
In the books Brienne's fate still seems to be tied with Caitlyn (as the undead Lady Stoneheart), but since that incarnation of the character was never introduced on the show "The Beauty" is going to need a new arc for season 6 onwards - and how awesome would it be to see her clash swords with the King of the White Walkers?