I love Iris, which works great for me in the winter.
ISM, Iris 39, Bois d'Iris, Chanel 19, Chanel La Pausa and Iris Pallida are great on the root-y side.
Iris Oriental, L'eau d'hiver and Lab. Olfattivo Nirmal are terrific, on the floral side of iris.
I came on here to recommend Iris Oriental and Nirmal.
Also by Parfumerie Generale: Cuir d'Iris is one I'd really like to own in the future.