My thinking was that DETOUR, THE GUILTY and HIGH TIDE are probably too prominent to put into a marathon. They can charge top dollar for people to see those films, and I don't think they'd bury the FNF restorations in such a setup.
The notion of shady ladies makes sense, however, and you're right that the list in this thread is missing titles that for whatever reason never got tagged as "noir." Will probably go back and see how many more films come up under "crime" from the time frame without a "film noir" keyword.
So with that, I'd figure that NIGHT EDITOR (a film that Eddie seems willing to show at the drop of a hat) has got to be in the running.
Let's see what we get for eight shady ladies...
QUIET PLEASE: MURDER (Gail Patrick)
FLY BY NIGHT (Nancy Kelly isn't all that shady, but she has "gam" appeal...)
NIGHT EDITOR (Janis Carter)
ARMORED CAR ROBBERY (Adele Jergens)
THE NARROW MARGIN (Marie Windsor)
ONE GIRL'S CONFESSION (Cleo)
HELL BOUND (June)
GUNS GIRLS & GANGSTERS (Mamie)
That gets you one certifiable "classic" in NARROW MARGIN, with two obligatory nods for Charlie McGraw, plus demonstrable Eddie faves from the 40s (FLY BY NIGHT, NIGHT EDITOR) and 50s (HELL BOUND, GUNS/GIRLS).
You might just show up yourself, armed and masked, for something like this! :-)