Koukaku Kidoutai: Stand Alone Complex, Black Lagoon Recommendations
Gritty feel with backroom politicking and conspiracy. Strong female lead with a mysterious past and mad skills. Both groups of characters also have a techie character(s), a strongman, someone who is relatively new and inexperienced in their new profession, and side characters to provide the occasional comedic crack. Also explores many questions involving a perceived loss of humanity and psychological well-being, in one falling to savagery and "base" behaviors and the other to in a sea of cybernetic technologies.
In fact, the main difference is which side of the law the characters work on and the cyberpunk vs renegade theme.
If you considered Ghost in the Shell a well designed plot anime, then you will enjoy Black Lagoon.
Similar thickness of plot with a similar level of Action and Deep Drama, the overall plot lines diverge but the soul of the animation is the same.
Both anime have an amazing female lead. Both anime use a lot of action with independent and badass side characters. They also have a lot episodic stories.