Separate staff and non staff users with two proxy models (FrontendUser and Editor). Nothing fancy, but as I ended up doing this again and again, this is a simple plug and forget solution, that I'll probably use in many projects from now on.

• minimal requirement are the is_staff and is_superuser fields on your user model
• staff users can be given the right to edit non staff users (currently not possible, or everyone can make everyone a superuser)
• better admin list views (filters, is_active, etc)

• custom user models support. if you could help, would be nice: #3
• fieldsets for staff and non staff users can be defined via settings (not yet)

In your settings, add to INSTALLED_APPS

INSTALLED_APPS = [
    ...
    'separate_users',
    ...
]

Also, you NEED to define a MIGRATION_MODULES entry for separate_users (yes, a migration is created for proxy models!). As your UserModel might be different, we cannot guess the needed migrations, so you'll need to create them yourself.

MIGRATION_MODULES = {
    'separate_users': 'your_apps.separate_users_migrations',
}

You'll need to create this folder, with an __init__.py in it, then you can run ./manage.py makemigrations (try --dry-run to see if it works as you would expect).

As of a django bug, you'll want to run ./manage.py fix_proxy_permissions, otherwise your non superusers (but staff) might not be able to edit frontend and/or editor users.