I'll nominate demik. Although he sometimes comes over as an arsehole, and has been banned several times not that long ago, of late he has really been shining as a generous, caring and thoughtful member of the GH community.
Also BunnyLake. He always seems to be doing something for the community - answering questions, sorting orders, running GBs (despite the recent claims about his performance, from what I've seen he is frantically trying to pick up the pieces after other people let him down; what would you do in that situation?), is overwhelmingly generous, and almost always courteous.