I have the same issue as: #97
But I don't want to install Anaconda and I could not resolve the issue.
I already installed libpng and FreeType, also added them to the paths. The files that the error message claims are missing are actually on the path... so I don't get what the issue is.

From this issue (matplotlib/matplotlib#13553) I gathered that if you would provide a "wheel" (https://pythonwheels.com/) this issue would be solved for everyone.
Many packaged create these wheels, for example matplotlib here: https://pypi.org/project/matplotlib/#files

About wheels from the link above:

What are wheels?
Wheels are the new standard of Python distribution and are intended to replace eggs. Support is offered in pip >= 1.4 and setuptools >= 0.8.

Advantages of wheels

• Faster installation for pure Python and native C extension packages.
• Avoids arbitrary code execution for installation. (Avoids setup.py)
• Installation of a C extension does not require a compiler on Linux, Windows or macOS.
• Allows better caching for testing and continuous integration.
• Creates .pyc files as part of installation to ensure they match the Python interpreter used.
• More consistent installs across platforms and machines.

Would this be possible?