As discovered during Uni chat last night, we sometimes have different definitions of what "Competition" is. In order for the poll to be relevant, it might help to define what is meant by competition.
From your post, it sounds like you're concentrating on Player vs Player types of competition ("competing with others"), as opposed to players competing with themselves to better themselves at tasks. I'd include such tasks as sneaking through aggro-infested areas to be among the self-competition types.
There is also the Matis arena, for slightly more combat-oriented competition.
We have the vote for Fyros Akenak, which ultimately distills down to a competition, if there are more than five participants.
From your post, it sounds like you're concentrating on Player vs Player types of competition ("competing with others"), as opposed to players competing with themselves to better themselves at tasks. I'd include such tasks as sneaking through aggro-infested areas to be among the self-competition types.
There is also the Matis arena, for slightly more combat-oriented competition.
We have the vote for Fyros Akenak, which ultimately distills down to a competition, if there are more than five participants.