Kit Harrington as Jon
Jon Snow has had a very eventful couple of seasons in Game of Thrones. He has been chosen as Lord Commander, murdered by his own Knights of the Black Watch, and after being brought back from the dead by the Melysandre, battled White-walkers and Ramsay' army. Season 6 ended with Jon being hailed as the new King in the North after defeating Ramsay with a little help from Sansa and Littlefinger.
If anything, Kit's character has proven that he cannot be easily killed off and his role in the game is too important. Already having signed contracts for season 7 and 8, it is very likely that we will continue to have Kit Harrington in the show and the developments will likely be explosive. With Cersei sitting on the Iron Throne and Deanerys sailing to Westeros to take over, we can expect lots of excitement in the upcoming series.