One of the things I see as a problem with some of the teams is the difference in levels of the members. A team consisting of something like naruto, jiraiya, yondaime, and rock, or something similar wouldn't work too well. The genins in most cases would just get in the way of the others, "most cases" increases with the increase in power disparity. I bet a team consisting of Itachi and Orochimaru with working arms could beat Jiraiya, yondaime, naruto, and rock. They'd just hold one of the little ones hostage, and kill the other.

And yeah rek, Naruto and Sasuke do make an excellent team.