Wordpress Login/Register Plugin With Multiple Categories of Users

Hello, everyone. I'm looking for a Wordpress plugin that allows multiple sorts of users to register.

For this particular purpose, we need a login for retailers, a login for non-profit organizations, and a login for shoppers. Ideally, each registration page would allow us to gather different details about the user and sort them into the right areas in a user profile.

Up to this point, we were using WP-Members, but it seems that it doesn't allow for separate registration pages since all the options for the registration page under Settings -> WP-Members -> Fields Tab configure fields for only one shortcode.