List of valid "guest_os_type" values for vSphere builder?

Hi, no matter what I put for this value, our templates show up in vSphere as “Other (32-bit).”
I’ve even taking to trying to edit the VMX directly during our builds. Nothing works.

For Windows 2016 I’ve tried:
windows9srv-64
windows
Windows2016_64
etc, etc

If anyone has any advice on how I can get the Guest OS to populate correctly in vSphere, I would really, really appreciate it.