I'd like to contribute our Darth Suzanne model to the development process.

(under CC0)
It was exported using Verge3D for Blender (a Three.js-based plug-in).
Here is how it looks online: https://cdn.soft8soft.com/demo/applications/pbr/pbr.html
The source files for this glb model are available in the Verge3D distro: https://www.soft8soft.com/get-verge3d/