You want dark? I'll give you dark.
I want to kidnap a very young attractive girl, one that's young enough to pass as my daughter and small enough to fit in children clothes.
I will train her to be an absolute baby. Obviously, 24/7 diapered, but also follow perfect discipline and always say "yes daddy" whenever I give her order.
I want her to behave like a perfect little girl I can be proud of, and if she doesn't I'll give her some pretty horrible punishments: spankings, enemas, locked in a cage or tied in the closet overnight, let some of my nastier friends fuck her, starvation, etc.
I also want to hire a strict assistant nurse / nanny to help raise and discipline her. The nanny will be in charge of keeping my babygirl in check and make sure she gets enough exercise / discipline daily when I'm too busy to look after the babygirl. Some psychological degree would be good too, to make sure the babygirl stays mentally healthy even while going through all this stuff.
After a few years of this training and brainwashing, the babygirl would be an absolute wet dream for any daddy dom: she'll be super cute, adorable, perfectly behaved, totally incontinent, and know she's nothing but a fucktoy for her daddy.