Out of these, Bellatrix.

Perhaps it's weird to select Barty Crouch from these

None.

None, really, probably Dolohov if I had to choose.

None

I don't know why, (probably cause of my Marauders Era "Slytherin Skittles" obsetion) but Barty

Lucius but only cuz his hair is flawless

I can see a few flaws with it, but Barty's a good one, too, actually.