Well, it depends. In the manga/anime, Kakashi has actually, on a number of times, been stated as one of the strongest in the village. His abilities aren't as limited as Gai, with Taijutsu only(Mostly), and Kurenai only uses Genjutsu, so anyone with enough training, or the full sharingan, could beat her. Asuma, is definitely strong, probably second strongest. Okay, here's my list, strongest to weakest.(In my opinion)
1) Kakashi Hatake
Of course, I don't think it truly matters. They'd fight as one, if the village was being attacked, so they'd cancel out each others weaknesses.