I think there are three which stand above all the others:
1. The Ardabil carpet, at the Victoria & Albert Museum in London. Here is one on-line image, here is an excerpt. I find this angle useful, but nothing compares to the real thing.
2. The “Tree Carpet” in the Philadelphia Museum of Art.
3. Jagdteppich (“Hunting carpet”), Museum für Angewandte Kunst, Vienna. Here is one excerpt. Try this too. Here is a full length view.
Those are the three best, or so it seems to me.