All the Wesleys!!!!! Complex, dorky, valiant. I even liked him in Buffy. It couldn't have been easy for him but apart from when he was screaming like a girl and various bumbling moments, he did actually did help. Even though everyone hated him he still helped in the end and he did offer to help Angel during the Ascension.
Also my favourite was standing up to Buffy in Choices. His argument actually made sense.
Wesley developed greatly but also demonstrated a tortured insecure persona. Everything from withstanding Faith's torture and going against the council to protect the creatures he's been taught to dispise, to shooting a guy in the leg and torturing a junkie.
One of Wes' traits has been his big picture thinking. Does the Wes' goals always justify his means of getting there? Not sure but at least he was willing to sacrifice himself to prevent more deaths (See Release).
What more can I say? Possibly a lot but I'll leave it there.