I think that depends entirely on the writers. Obviously something like Dennis O'Neil's Green Arrow is hard to top, but I could say the same about "Demon in a Bottle". I think both characters have had many great comic stories.
Green Arrow by a significant margin. He's had the Grell run, the Lemire run, and even the recent Percy run just to name a few. His comics collectively are definitely among the top in terms of consistent quality.