Hi,
For an intranet website, you can consider templates such as Wimble, Artolio, Indigo, Mega Inc, or Sphere as a starting point.
Among these, Wimble would be a good choice because its Team, Services, Blog, FAQ, and other layouts can be adapted for internal departments, employee profiles, announcements, policies, and resources.
Please note that the template mainly handles the design. Features such as employee login, restricted content, document management, internal forms, staff directory, or HR-related functions may require Joomla user access levels and additional extensions.
SP Page Builder Dynamic Content can also be useful for creating structured employee or department directories.
You can check our templates from here:
https://www.joomshaper.com/joomla-templates
Hope this helps!
-Regards.