How to allow a role to edit/manage user accounts e.g. click Edit and change email, username, password etc., but do not edit the fields itself, e.g. cannot just go to Manage fields
and delete/create/edit fields?
Field permission doesn't do that, it's specifically just for each field per field.
Do not have access to admin/config/people/accounts/fields
at all.
But they still can go to admin/people
and update/manage users. So they still must have the Administer users
permission