One man army

Good one man army thriller about an accountant/assassin who takes on a corrupt company.

A action comedy movie by Luc Besson about a hired gun that develops a weird friendship with an orphaned teenager and teaches her to kill. There are a lot of movies with this plot, but this one is funny while not trying to be a pure comedy. It has action, but there's also drama. Definitely one of his best films.

Fun one man army where an average-looking dude takes on the Russian mob.

An action comedy about a woman seeking revenge. The movie uses subplots to describe its characters and doesn't waste a second of your time. It's violent, comically unrealistic and surprising. Even the fight scenes are somehow interesting.