[Question] Anime with smart Protagonists

[Narutobirama]

What Anime have characters with smart Protagonists and battle of wits?

I have already seen Death Note and Code Geass. I also watched Monster and Steins gate, though there is less battle of wits.

 

[Indora]

case closed

 

[take it easy]

full metal alchemist

bleach

 

[Memento Mori]

Aldnoah.Zero

 

[Drakengard]

Kaiji or maybe One Outs