I vote @pfunk.
But you can always reach further down the list and cast that approval vote for other people working on projects that could use a boost. A lot of people have been in the top-20 for a long time and some aren’t really doing much. More have been in the top-50 for a long time and some of those don’t do anything at all. Many price feeds are several months old and the users cannot be found.
I vote @ats-witness. Although I've mutually supported @netuoso since the beginning, before he became a celebrity.