This thread fails in so many ways it's not even funny, smh. Half of the pages you posted dont even reflect intelligence, but rather simple usage of techniques granted to him through sharingan. There has been no match where Itachi has shown any special intelligence, he simply learned Uchiha history/abilites and utilized them, nothing more nothing less.
The moments in which he tried to some intelligence (if that's what you wanna call it) was his way of planning ahead. However, each time he tried to have any significant effect he FAILED miserably.
-against Kabuto he simple used a forbidden jutsu to end Edo, which shows no feat of intelligence just intel and this failed as all (major) Edo were already sealed -_-
-against Orochimaru both were standing face-to-face and he used genjutsu, how simple was that, like really. Now, I'll give credit for being about to refrain him, but most of the credit is the sharingan itself. Actually when thinking about it, for him to have been so superior in genjutsu Orochimaru was still able to move and attempt to break it regardless. At the end his attempt to rid Orochimaru FAILED
-against Nagato, i dont even need to say he thought of the most common sense tactics, while Nagato was a controlled dead brain, next to two other dummies (Naruto and Bee). In the situation i would hope he would look smart.
-any attempt of trying to save/prevent/influnce Sasuke failed more than once, the shyt isnt even funny.
-he wasn't able to do anything significant in stopping Tobi, or the capturing of Naruto that required any base of intelligence.
Itachi is a little above average in the intelligence departemnt, but people fail to even really consider what he has actually done the shows any special feat of intelligence. Mastering the use of genjutsu is no small feat, but so have others.
It's simple knowing you shyt and using it to your advantage, in this case the Sharingan and Uchiha history.