Animes with OP MC that knows he is OP

I'm a fan of OP main characters that know they are OP and are cockyish about it, so I'm looking for another one to watch. MCs like Saitama, Meliodas, Izayoi, etc.

A few examples that I have watched:

* Nanatsu no Taizai: Pretty much all sins fit. * Hellsing (original and OVA) * GATE (still airing): While the MC isn't really OP, the army is and the way they overpower the medieval opponents is amazing to me. * Overlord (still airing): Lord Ainz is another great example. * One Punch Man (reading manga, waiting for anime) * Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo? * Katanagatari

So, any suggestions?