Anthropologie perhaps holds the top spot in window reputation. Often whimsical and dreamy, featuring repetition of simple recycled products, they do a great job of staying within their branding.
Lanvin has a more edgy vibe, with more flexible mannequins that have a flair for the dramatic.
There are others who have their good moments. Bergdorf is bizarre, surreal, and completely over the top.
Le Printemps is simple and aesthetically pleasing.
And Selfridges has a more architectural feel.
(photos collected from 2.bp, pinterest, ullam, michaelreinert-style, thewindowshopper, lavieterrible, jakandjil, habituallychic, elle, mannequinmadness, retaildesignblog, journaldesvitrines, lepetitparistravelplanning, sfd, smudgetikka, and behance)