Coprinus comatus, the shaggy inkcap, lawyer's wig, or shaggy mane.
The next best known, and also conditionally edible:
Coprinopsis atramentaria, the common inkcap, inky cap, or tippler's bane. Edible, but causes effects similar to those of disulfiram. As such, alcohol is to be avoided before, during and after consumption.
Also any of the following, many of which are poisonous: