From what I can tell old dinosaurs like Match.com continue to dominate this field. OkCupid was the last site I heard of that people found unique in approach, but even that was mostly used for the fun tests and quizzes rather than dating.
The idea that just because a category has competitors means it's "dead" is quite wrong on a lot of levels. That's the beauty of the internet really. New ideas will come along and trample the old, and usually on a much shorter timescale than anyone expects.