WebPerf PageSpeed Help me find more HTML templates for PageSpeed Testing

As a page speed and web performance addict, I am always benchmarking and testing to see what works in terms of improving page load speed and web performance. For such testing in a increasing HTTP/2 HTTPS based world, that means using a variety of standardised HTML templates or web application configurations. This will allow more repeatable benchmarks which I hope other users can repeat for themselves using these templates. Users can load up such HTML templates etc and test pagespeed and HTTP/2 HTTPS performance using these HTML templates and see how they match up with other web configurations or see how their server configuration changes affect web performance.

I am compiling some HTML templates for my benchmark testing on Github repo at GitHub - centminmod/testpages.

Do folks have some other suggestions for HTML templates, demo landing pages etc that they have come across ? Please post a link to any and all suggestions. Preferably the free kind