Some more A grade anime suggestions
1. Deadman Wonderland (2011)
After being falsely convicted for the murder of his entire class, a young man must learn to survive in a mysterious prison with a perverted take on incarceration while also looking to clear his name.
2. Parasite - The Maxim (2014)
17-year-old Shinichi Izumi is partially infected by a Parasyte; monsters that butcher and consume humans. He must learn to co-exist with the creature if he is to survive both the life of a Parasyte and human, as part monster, part person.
3. Death Parade (2015)
After death, humans go to either heaven or hell. But for some, at the instant of their death, they arrive at the Quindecim, a bar attended by the mysterious white-haired Decim who administers a final test.
4. Attack on Titan (2013)
After his hometown is destroyed and his mother is killed, young Eren Jaeger vows to cleanse the earth of the giant humanoid Titans that have brought humanity to the brink of extinction.
5. My Hero Academia (2016)
A superhero-loving boy without any powers is determined to enroll in a prestigious hero academy and learn what it really means to be a hero.
6. Soul Reaper (2008)
The plot of the episodes follows Maka Albarn, a "meister" of the Death Weapon Meister Academy (DWMA), and her living weapon, Soul Eater, as she seeks to make the latter into a "death scythe" through absorbing the souls of evil humans.
7. Darwin’s Game (2020)
An unknowing Sudou Kaname is invited to try out a new mysterious mobile app game called Darwin's Game, but later realizes that he's in for more than he's bargained for when he finds out that there's no way to quit the game.
8. Re Zero – Starting Life in Another World (2016)
Shortly after being summoned to a new world, Subaru Natsuki and his new female companion are brutally murdered. But then he awakes to find himself in the same alley, with the same thugs, the same girl, and the day begins to repeat.
9. Charlotte (2015)
The story takes place in an alternate reality where a small percentage of children manifest superhuman abilities upon reaching puberty.
10. Seraph of the end (2015)
One day, a mysterious virus appeared on Earth which killed every infected human over the age of 13. At the same time, vampires emerged from the world's dark recesses and enslaved mankind.