I nominate Grellas[1]. Aside from the value I get in reading his posts, he is an actual member here on HN, and that's got to count for something over Snowden.
Edit: According to the leaderboard[2], he's got the 17th highest amount of Karma, the highest per-post average - an impressive 41.8, which is almost double the next-highest, [cletus] and roughly quadruple patio11, for reference.