Ah, Carver. So worth playing a mage just to have him. I enjoy antagonizing him. 
Aaaaand CTD. That's a drink.
EDIT: Artemis, how did you get there?
Dragging Carver's grumpy backside around is half the reason I love playing mage in DA2 >.>
Now, the big question. Name me one main DA character who doesn't whine or complain at all. 
Serious. I can't think of one...
Ah, shoot. Now sincere sniffles. Poor Bethany
She's the second best sis one could have.
As for your complaining question, how about Iron Bull? I admit that I don't drag him along a lot, so I probably haven't heard the bulk of his ambient yakkity yak, but he usually seems to be pretty affable. I mean, sure, he complains about Krem not holding his shield right and a few other minor things, but overall he really is a likable guy.