Two Kids made Kage..?? I understand Gaara's one.... Who is the other one..??Excluding Naruto...Kakashi and Hiashi are still ahead of him. Shikamaru runs out of chakra all the time. You need to look at this by the Narutoverse rules. We've seen them make two kids kage already just because they are strong. Now real world rules? Shikamaru is probably the best choice.
Finally.... Someone agrees with me....he will be a much better choice compared to naruto....even if he says 'what a drag' he knows his job too well and is one of the most intelligent shinobis of the leaf...yes...he doesn't have the strength but if he masters his clan's techniques then he can be troublesome to deal with. We can't forget that he defeated the immortal Hidan....