The Bogart and Bacall version on The Big Sleep is a personal favorite of mine. But I also think that
Murder,My Sweet is also excellent with a break out performance by Dick Powell. Although Lady in the Lake is not in the same level as the other Chandler adaptations, there is a brilliant scene where an injured Marlowe is dragging himself towards a phone booth. It is done through his perspective.
It adds a dramatic grittiness that the otherwise gimmicky but entertaining movie lacks.
I think that Bogart's Sam Spade is darker and more corrupt than Bogart's Phillip Marlowe.