Movies similar to “The Killer” by David Fincher?

Just watched “The Killer” by David Fincher for the first time and I could not get enough of it. The movie isn’t perfect by any means, but something about the atmosphere. The perfectionist killer going over all the details making sure everything is right. (Even though he is not really as perfect as he thinks)

As the title implies, I’m looking for suggestions for movies similar to this. They don’t all have to be Hitman movies. Any movie that has the same type of feel, with super perfectionist detail orientated characters.