Akame ga Kill!, Bungou Stray Dogs Recommendations
Both series involve an MC character that joins a special squad. Each person in the squad has a single, unique skill. Where they differ is in the nature of the squads: the MC joins a special detectives squad in Bungou Stray Dogs while the MC in Akame ga Kill joins a squad of assassins.
In both series, the squads face an immensely powerful and cruel group. Neither series holds back on the violence as well.
Boy joins group of people with special abilities, the group is in conflict with other people who also have special abilities.
Good series ^^