The old detective fiction is a all well and good as they say. However, it's all steeped in dialogue or at least those mentioned seem that way. Elmore Leonard(who is more current)can be included and Dashiell Hammitt and Raymond Chandler; though the latter two do it with first person and the narrative often sounds like an extension to dialogue, only where the POV is talking directly to the reader and they are detectives, so it doesn't bother the reader that they are like a wideangle lens that takes in everything and describe it all in detail and flushes it out on the page. It all reminds me of a good play with all the snappy dialogue, you know the ones that used to make great movies because of that dialogue; and back then they only had black and white pictures sort of a noir thing that translated well with those if the actors did well enough with the dialogue to pull it all off and you don't see that much today because we have technicolor and special effects that like to crowd out all that interesting dialogue or even that narrative over-voice.
But it all makes the narrator judgmental because the story is done in such a way that they end up being the omniscient narrator that we have to trust because everything is influenced by their own judgment of people and places. They have to be careful about consistency, because if they slip up they might become an unreliable narrator and then the whole house of cards begins to crumble and the story becomes weakened. Then again it all boils down to writing well and then the reader wont notice when the dialogue peters out a bit and the narrative starts up and it might sound like we are in the characters head except that the dialogue has carried the reader far enough that he believes this is just an extension of dialogue that we already know is judgmental and, if there is a character they can attribute it to, it doesn't matter that it looks like we are in their head because it's just something they wanted to say and just didn't say it for some reason and sometimes the reason they don't is even mentioned in passing. It's about how to balance things and make the whole thing easier to read and harder to analyze on the fly so that if the reader wants to see what the author is really doing they have to go looking with that intent and that could ruin the story.
Have to go back and read those with the more analytical mind some day.