Berserk is the dark soul of manga. Follow Guts, "The Black Swordsman," a mercenary branded for death by demons. The manga is famous for its incredible art (especially the later volumes) and the heartbreaking Golden Age arc.
A 34-year-old shut-in dies and is reincarnated into a fantasy world as a baby named Rudeus Greyrat. He vows to live a better life this time, mastering magic and building relationships. hentaismile
Currently the king of modern shonen. Jujutsu Kaisen follows Yuji Itadori, a high schooler who swallows a cursed talisman (the finger of the most powerful demon, Ryomen Sukuna) to save his friends. He joins an organization of Jujutsu Sorcerers to hunt down the remaining fingers. Berserk is the dark soul of manga
Never watch the 2016 CGI anime. It is an abomination. Recommendation: Read the manga. A 34-year-old shut-in dies and is reincarnated into
Attack on Titan is arguably the most important anime of the last decade. Set in a world where humanity lives behind massive walls to escape man-eating giants (Titans), the story begins as a revenge tale but spirals into a complex moral war about freedom, prejudice, and genocide.
Tohru Honda ends up living in a tent in the woods, only to be taken in by the mysterious Sohma family. She discovers that thirteen family members are possessed by the animals of the Chinese Zodiac and turn into them when hugged by the opposite sex.