I really like #2 and #8. Also #6.
There was a woman at our table at the Xmas party wearing a long straight fluid black skirt to the ankle with a tuxedo jacket and it looked very sharp. I was thinking something like that could work for your event too. She didn't have a shirt under the jacket and it was more exposure than I would be comfortable with but I was thinking to try to find similar pieces for next year but with a low cami in black or cream silk.
Had to come back to my post since I had forgotten to comment on DD too. She looks very cool in her suit. Do you think you could talk her into a very narrow dark tie? Perhaps she should look at some pics of David Bowie from his post ziggy days when he went more elegant and debonair.