Often we wish we could buy Win7 to delete the Win10 on the Win10 machines.
Win10 somehow, is less reliable, often doing weird things, updating without permission, sending strange data out, have security update that kill half of our online bank apps, our another update that make the keyboard stop working, or nag about Cortana at same time Cortana is not available in our country, show ads, etc...
The only reason the Win10 machines are still Win10 is because Win10 was part of the deal when buying said machines...
Even if you could install Windows 7, you would be very mistaken in doing so, as it would put your company at significantly greater risk. Even while security updates are still available, the differences in the platform already lead to scenarios where large malware infections tend to be almost entirely on machines which weren't running Windows 10.
If someone really just doesn't like Windows 10, my advice is to switch to Linux. Continuing to run obsolete operating systems just isn't okay. :)
LTSB is not intended for computers which browse the web. It's very specifically only intended for things like embedded platforms like computers operating medical devices. Aka, things that require the Windows kernel to run, and insane platform stability, and literally like nothing else. Business users who need a desktop should be running Enterprise, which does allow you to disable all the things most Windows installs don't, but is far more capable than LTSB.