Definitely Sasuke. Their bond is such that Sasuke would not stand by and let Naruto destroy Konoha. He has his own reasons to protect the village now. Shikamaru is also a likely candidate. He's intelligent and would quickly figure out that Naruto's actions are wrong. He would use his strategic mind to try and stop Naruto. And Hinata, who loves Naruto deeply, would oppose him in the hopes of bringing him back to his senses.
Sasuke would be at the forefront. He has a history with Naruto and a newfound loyalty to Konoha. Naruto's attack would go against Sasuke's current beliefs. Then there's Naruto's old friends like Choji and Kiba. They have grown up with Naruto in Konoha and would not let him harm the village. They would fight to protect their home and their friend from himself. Also, the ANBU black ops would be sent to stop Naruto as they are tasked with protecting Konoha from internal threats.