I think there is a fair argument that DS9 produced more influential writers than any other Trek series, as Sci suggests. I'm not sure it would hold -- but I think it could be made.
Wait, didn't most of the writers on DS9 start out as writers on TNG? They were just carried over when TNG went on and DS9 was in it's run. To say that DS9 produced more influential writers than any other trek series when those writers got their start on TNG is wrong.