RBAC vs ACL vs Other

I'm trying to integrate a role based user access screen where roles will inherit from each other. For example:

Superadmin (top level role at all times) > Admin > Publisher (inherits and can set permissions based on Admin) > [Editor][Manager]

I've tried using Baum, however, retrieving the data, in a way that can be used/displayed is very tricky. Does anyone have any ideas on how to get this data out?

I'm trying to display a list of roles on a role page as well as a dropdown for adding a new role.

Thanks!