Cosmic Desktop by System 76 is really excellent. I've been using it for a little while now. I believe its still in pre-alpha, so take that word of caution but it does window tiling exactly the way I want with modern but minimal chrome.

Cosmic Desktop by System 76 is really excellent. I've been using it for a little while now. I believe its still in pre-alpha, so take that word of caution but it does window tiling exactly the way I want with modern but minimal chrome. 

https://blog.system76.com/post/cosmic-the-road-to-alpha

Wow, Cosmic Desktop is absolute perfection!