Enen no Shouboutai, Jujutsu Kaisen (TV) Recommendations
Both feature ranks of trained warriors (Jujutsu sorcerers in jjk and the Fire force in FF) who battle non-human dark entities (curses in jjk and infernals in FF).
Both have great world building, art styles and humour.
Both are dark fantasy battle shounen anime with memorable characters, incredibly well drawn action scenes and engaging storylines.
Both have very lively protagonists that desire to help people, using their special abilities.
Both have horror themes and vibes.
Good shounen action scenes