Hard to go wrong w/ classic Bogart
"The Big Sleep" is one of his best and most celebrated but he's definitely an actor whose filmography is worth going through, at least the most highly regarded films from the 40s on.
Have never read any Chanlder, Hammett or any noir novels myself. Unless "The Killer Inside Me" counts. Have a copy of "The Long Goodbye" but haven't gotten around to it yet.