Following Shikamaru and Sasuke, Shino is third smartest; judging his fight with Torune, his ability to recognize Minato's Hiraishin when he moved everyone from the barrier (even though it was his first time of seeing it), his ability to find out the enemy amongst Kiba, Hinata and himself; I personally would like to put him with Sasuke, but looking at three tomoe Sasuke before he had MS, his fights with the likes of Deidara and Itachi, and for someone who trained with the likes of Orochimaru, I would say Sasuke should be above him.
Shino is quite underrated, in a fight, I say he stomps the likes of Sakura, Kiba, Tenten, Lee(without gates and no removing of weights), Ino, He knows all of Chouji's jutsus, so I would give him a 60% chance of winning. His insect hidden jutsus are second to Torune(a personal anbu guard to danzo) and his smart nature are quite near the likes of Sasuke and most jounins of konoha, Most persons wont survive it.
Having said this, I would rate others according to their smart nature/intellect;
Gaara - kage level
Neji - jounin level
Sai - anbu level
Sakura
Naruto
Kiba
Tenten
Lee
Hinata
Ino
Chouji
Shino is quite underrated, in a fight, I say he stomps the likes of Sakura, Kiba, Tenten, Lee(without gates and no removing of weights), Ino, He knows all of Chouji's jutsus, so I would give him a 60% chance of winning. His insect hidden jutsus are second to Torune(a personal anbu guard to danzo) and his smart nature are quite near the likes of Sasuke and most jounins of konoha, Most persons wont survive it.
Having said this, I would rate others according to their smart nature/intellect;
Gaara - kage level
Neji - jounin level
Sai - anbu level
Sakura
Naruto
Kiba
Tenten
Lee
Hinata
Ino
Chouji