(Blue, you didn't expect the short form of an answer from me, did you?

I figured what the hey, it's an interesting subject to think about, so I'll try to spur more thoughts from others, too!)
Myself, of course, because I could never feel Sandi's fantasies as well with any other woman playing the roles that most turn me on.

Of course, I've never asked my husband this question, either......and likely I won't in case I don't like the answer!....lol.
I'd love to hear choices from other female members, too, in addition to the great ones suggested by each male so far.....please note, I did not say 'suggested by each male member'....nor did I say anything about judging a male's choice here by the size of a male's member..

.....though the latter might be an accurate barometer!
Other than that, I'll go a different route and say the Sharon Stone of Basic Instinct days....and maybe even today since she still rocks a bikini at a couple years above 50.
The 'why?' is that my ideal choice for 'victim' must be able to be equally good (for my tastes, of course) in 'soft', Stanwyck-like, I The Jury-like, film noir settings and roles and also be able to 'take a lot of bullets' or whatever in a 'tough girl, bad girl' role, ala Faye Dunaway in Bonnie and Clyde.
I'm not at all into whining victims, and though one could say Sharon's role in Action Jackson was as an 'innocent victim', she was married to a mobster, so that sets that '
mood' for me differently than simply an 'innocent victim'. And her bare-midriff outfit and 'getting it while in a clinch with her man' is a role I love.
Having seen Basic Instinct and like 'all of us' here wanting so intensely for her to get it the same way in the end as she gave it to her victims, and having seen her tough-girl fight against Ah-nald in Total Recall, and her sexuality in Dominique or whatever that movie was, I see her as a woman of many moods who enjoys and would be superb at emoting each of the ones with which I most identify and that I most prefer seeing for my own greatest fantasy turn-ons in video.
Even her sex/kissing interludes with Douglas in Basic Instinct conveyed to me a woman who also enjoyed being 'taken' herself and 'letting go' as victim as well as when she was a Killer.
Again, that's because I most enjoy both of those types of roles.
I need 'attitude' in my favorite victims (ala the smoking scene in Basic Instinct where her sex controlled the room!), whether the sultry Stanwyck (whom I was not as turned on by when she was a cowgirl with a gun who gets shot, loved her softer and more sultry ones far more) roles or the go-down harder roles. So, as I approach 46 in a couple months, I'm more partial to 35+ year old 'minds' and experiences. That means I want 'experience' in the female victim, not one who looks 16.
Put another way, I want 'depth' in the actress, because personally I know I am 'far better' sexually and sensually, more aware and more in tune with it all, at 46 than at any earlier time in my life.....experience counts for some 'jobs', you know.
Obviously, there are 'tons' of other choices in that age group and in the more popular 25-35 age group where those like Megan Fox would be high on my list.
One woman, one vote...plus the 'why' required by the question, plus additional (surprise!!!) commentary intended really only to 'prick' other imaginations.
So I throw Sharon's name out there as my choice, but I'm easily adaptable to other choices...lol.
None of this is negative commentary to our 'Producer' actresses, not at all. I'd love to act in a fantasy video with any mentioned here and many Others. I very much enjoy watching each actress already discussed here, I just chose a 'non-Producer' actress to get some thoughts from the rest of you in that or those categories also!
Sandi