Iron and Blood 1 for Hall of Fame: Arguably one of the most successful games in IOT history, it ran for over half a year, survived a GM switch very well, and brought out a very believable, fun, and dynamic world due to great game-play dynamics, great players, and of course, great GM's.
IOTIV for Hall of Fame: I pinpoint IOTIV as basically the start of the modern, organized IOT. Thorvald brought control and organization to a game which before this iteration, had none. He "tamed" the wild west that was the original IOT's so to speak.