#25 - Melisandre
You may be thinking that on a list of 25, Melisandre would be higher up on the list. But the witch has some making up to do. For a long time, she praised Stannis as being a Messiah, the one who should be given the Iron Throne, but obviously, she was wrong and in the process had quite a lot of people do some pretty horrible things to support the late Baratheon. Sure sure, she brought Jon Snow back to life and will surely be playing a part in this upcoming season, but after falling short of expectations in the past, it's time to let some other interesting characters shine.