'Tokyo Ghoul' can be thought of as having a similar story. It has a world where different groups are in conflict, and the main character has to find his place in this dangerous world. Just like in 'Akame ga Kill' where the assassins have to deal with the empire's oppression, in 'Tokyo Ghoul', the ghouls and humans are in a constant struggle for survival and co - existence.
'Fullmetal Alchemist: Brotherhood' has some similarities. There is a complex political and power structure in the story, and the characters have to navigate through it while facing many challenges. The main characters' journey to uncover the truth and fight against those who misuse power is somewhat comparable to the fight of the Night Raid in 'Akame ga Kill' against the corrupt empire.
'Black Lagoon' is quite similar. It features a world full of crime and danger, and the characters have to fight their way through various tough situations. The main characters in 'Black Lagoon' are involved in the underworld activities, much like the assassins in 'Akame ga Kill' are involved in a dangerous line of work against the empire.