All King deaths is where we show all the Kings who have died in a Game of Thrones. The criteria is that you have to claim to be a king.
The deceased in order of appearance Viserys Targaryen, Robert Baratheon, Renly Baratheon, Xaro Xhoan Daxos, Robb Stark, Joffrey Baratheon, Mance Rayder, Stannis Baratheon, Balon Greyjoy, The Mad King Aerys Targaryen and Tommen Baratheon.
source
You missed Ned stark