Admin hierarchy and top-admin protection

Hi,

Can any user with full admin privileges (ALL capabilities turned on) be hidden from other users with admin privileges (with comparatively lesser capabilities turned on) in the ‘Users’ area (list_users)? I want to create a sort of hierarchy of administrator roles and users, where the user with the top admin role with ALL capabilities should be hidden (or at least undeletable, unremovable and uneditable) from other users with lesser admin roles and capabilities – in the ‘Users’ area. Is this possible? Is there any plugin for this, and if not, is there any other way to achieve this?

Regards.