Other than the Dragonborn, most guild leaders and jarls not named Balgruuf, Dengeir of Stuhn. I'll name some of the douchiest though.
Jarl Siddgeir: Jus look and talk to the guy, seriously.
Mercer Frey/ Brynjolf: "Is there some reason why your bothering me?" - Yeah I'm trying to ressurect your dying guild jackass. "Sorry lad/lass, I don't have time right now." - Understandable, moving from table to table and doing nothing must be very hard and serious buisness.
Galmar: "Why is it you want to fight for the Stormcloaks?" - Im carrying multiple uniforms of imperial soldiers I've killed,
I'm a damn Nord and I'm wearing the armor of your weak rebellion in the name of Skyrim maybe?
Astrid: The hell she think she is? Questioning the Night Mother, any true DB member would have killed her on the spot or at
least questioned her.
General Tulius: Emotionless. Unsympathetic. Afraid to get his boots dirty. Disregards the peoples in which land he's in by saying 'well ya know, the Thalmor did say so sooooooo.' Death by be-heading for Mr. Robot General 'who gives a damn if your people are dying?'
Ulfric Stormcloak
: Ill tempered. Hasty. Neglects the people of his city that aren't nords. Still rather have him as High King of Skyrim though, any other sissy would just lie down like the Empire, unacceptable
dis-honorable mentions: Braith, Nazeem (hes funny though), Dirge, Jarl Elisef, Vignar-Graymane (post SC victory) and Olfred Battleborn. Could name more