Hello Janeturenne,
I would have to say that Agent Phyllis Coulson is the finest and most professional person I have had the honor of working with since I’ve woken up.
As for the second part of your question, I don’t think it’s fair to single anyone out. The Avengers are a team and that means we accept everyone’s strengths and weaknesses and come together to be more than what any one of us could be alone. No matter how occasionally inconvenient.