You might like The Skull Man, it's kinda like Darker Than Black, but with more mystery and it's only 13 episodes, although you might like the anime better if you like the Kamen Rider franchise (live-action superhero series). Other than that, you might like Phantom: Requiem for the Phantom, Witch Hunter Robin, or Psycho-Pass.
You may try: K Project Death Parade Psycho Pass Zankyou no Terror Gosick.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.