Using path method, there's no choice for "no-role" registration

Issue Summary

I have a need to use the path method and have different fields on the registration forms for each "member type" that I have setup using content profile. That part is working awesome with AAR. What I don't have is the ability to create a path for a registration form, that will simply create an "authenticated user" like the core does now.

For example:
I have roles: "Artist", "Promoter", "DJ" but I also want to allow registration with no role, which would be in the capacity of "fan". And no, I don't want to have to create a "fan" role, I want to be able to use the "no-role" method of just being an authenticated user.