I'm looking for a new anime series, do you have any ideas?

I've been looking through Naruto, Boruto & Seven Deadly Sins. So at Naruto also Shipudden. Since I watched Seven Deadly Sins on Netflix, the 3rd seasons, is there a sequel because two sins are still alive? Or did I misunderstand the end.

My second question is, is there anime similar to the 3 where the protagonist is a real beast but it doesn't show anyone like Meliodas so it doesn't necessarily reveal it to anyone and keep it to himself. And the protagonist also has a goal and is trained by someone who has already achieved the goal, I love such anime.

Please name all anime in the direction!

I'm new to the scene.

Seven Deadly Sins continues

There are only two seasons of Seven Deadly Sins on Netflix. The third is currently running and will only be added in 2020. Isn counter error.

Nurarihyon no Mago.

Tokyo Ghoul corresponds to your description, the protagonist conceals that he is (has) become a ghoul

In my opinion, Tokyo Ghoul is also one of the best animes

One Punch Man is an anime where he somehow reveals that he is mega strong but somehow nobody really realizes it

I think season 1 is also on Netflix