I already complimented Zac Posen for custom making something for the event, I will add to the list:
Peter Dundas for Emilio Pucci for modifying one of his collection pieces for Beyonce, yeah she could not walk up the steps without assistance, but that goes with the ridiculousness that I associate with Beyonce. I am also cool with him putting his other muse, Jessica Chastain, in a regular dress from his latest collection as I don't think that every designers' guests has to be outfitted for the theme.
Valentino Garavani - Although he did not custom make Natalia's garment, he seems to have given the theme enough thought and pulled something very fitting from his archives.
Stella McCartney and Stefano Pilati for Yves Saint Laurent - Neither of these two are exciting designers, so I would not expect them to go hog wild with skulls, feathers, tartan and whatnot, but I give them an honorable mention because I think that they attempted to address the theme with the modifications and styling of their muses: Madonna, Hailee Steinfeld and Florence Welch.