I like Ratpoison. If you want to use Click-To-Focus, you can install StumpWM (Ratpoison has optional support for sloppy focus, but normally you use keybindings to focus windows). CWM is also okay.
I have also tried Wayland but none of the WMs aka Wayland Compositors are good enough for me.
* Sway - The only one that 100% works but I don't want to use i3 clone.
* Cagebreak - A clone of Ratpoison (promising!) but it doesn't allow you to Remove individual frames (But you can use "Only"-command to close all other frames except the currently focused one).
* Hikari - A clone of CWM for Wayland but it seems to have low development activity now... Also, IIRC, libucl config file library has some memory corruption bugs that aren't fixed yet.
* LabWC - A clone of OpenBox. Firefox crashes sometimes when I access the bookmark bar. Heavily beta quality, in my experience.
>>12
exwm is interesting but it's not practical because if Emacs hangs, it will freeze the whole Xorg GUI.