Jiraiya - fair nuff I guess. Although I'm not sure if Sakura is really considered a main character anymore. Lately she hasn't done anything. At the beggining she was there, but she is starting to fade away, and just become a character that cheers the others on. That is, assuming Tsunade doesn't teach her a thing or two.

Death Boo Z - That seems about fair. Temari would also be considered a Chuunin. She was pretty good while fighting Shikamaru, she was able to thing ahead and calculate his shadow, although she wasn't quite good enough, she still did well, and has one hell of an attack.