Boston is pretty damn arrogant. At least, he is the most verbal about it. From what I've read Alhazi may have an issue with arrogance as well though I don't know him/her well.
Richard Sharpe was pretty arrogant, and just kind of a jerk.
here are some quotes from him in the ONE game I played against him.
"how is it possible that you have played over 2000 games and yet still have zero grasp on how to play this game?" "you must be a role player... only way to justify such strategic incompetence" "very observant I see..." "now you surrender?"
yeah I talked about this before in a clan forum, explains why I still have the quotes.
@TBest - does perpetually verbally (err, textually?) abusing a teammate count? (In said situation I had to fight 2/3 opponents in RoR without any help, starting turn 2. Obviously I lost) If so, Lord Chordate has my vote. :p