This is a question I get asked all the time. “I love it, but where is the Killer/ Winner type?”
The first thing to address here is that Winner and Killer are not interchangeable terms in the world of types. In Bartle’s types, the Killer is a type of player who gets pleasure from domination and humiliation of other players. This is not the same as wanting to win. If winning is what crushes the spirit of other players, then the killer would probably do their best to win – but that is not their driver.