I recommend animes like Wine of Eternal Life, Gun Grave, Death Agent, or Death row Paradise.

Headless Horseman Chronicles, School Apocalypse, Death Note, Empty Realm Fairy Melody
I've seen all of this- -

Answer 1

There are many animes like Wine of Eternal Life, Gun Grave, Death Agent, or Death row Paradise that can be used as a reference:
1 " Sword Art Online " series: This is a sci-fi anime with the theme of virtual reality. It tells the story of humans entering the virtual reality world through VR technology. It also explored the relationship between virtual reality and the real world, personal choice, social responsibility, and other important issues.
2. The Blade of the Destroyer series: This is a Japanese anime with a battle theme. It tells the story of the protagonist, Tanjiro, who embarked on a journey to destroy ghosts in order to find his mother. At the same time, it also reveals the theme of humanity, family, friendship and so on.
3." Attack on the Giant " series: This is a Japanese anime with the theme of the battle between humans and giants. It tells the adventure story of the protagonist Alan and the giant. It also explored human survival, racial discrimination, political power and other issues.
4 " The Blade of Ghost Destruction ": This is a Japanese anime with a battle theme. It tells the story of the protagonist, Tanjiro, who embarked on a journey to destroy ghosts in order to find his mother. At the same time, it also reveals the theme of human nature, family, friendship and so on.
5 " The Gate of the Stone of Destiny ": This is a Japanese anime with the theme of time travel. It tells the story of the adventure of the protagonist Graeme and his assistants who discovered the possibility of time travel in order to change the past.
The animes recommended above are all excellent works with profound theme and excellent plot. They are worth watching.