Some of my favs. are very mainstream (One piece, Death Note, Code Geass etc.) so I'll avoid saying those and try to list a bit more unkown ones: Akagi Kaiji One Outs Samurai Champloo Hellsing Ultimate Law of ueki Konjiki no gash bell Utawarerumono just to mention couple.
Bleach Gundam Wing Trinity Blood Yu Yu Hakushu Code Geass: Lelouch of the rebellion Prince of Tennis Inyuasha Full metal alchemist Samurai X.
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.