Bronn
Kill Count: 26 (plus at least 8000) Everyone knows this sellsword is more that capable with a blade. He has been dropping bodies season after season. But we are crediting him for shooting the flaming arrow into a ship carrying barrels of wildfire that completely annihilated Stannis’s fleet on the Blackwater. Thirty-nine ships were lost to the fire, so with a conservative estimate that there was an average of 200 or so soldiers/crew members per ship, the number of bodies at the feet of Bronn is at least 8,000 (a nice round number).