If I were me, I’d check out this tutorial for xfce+i3.
MATE and lxde are also possible to set this up on.
I believe it should also work on lxqt, but I’ve never tried.
Gnome is very difficult in my experience. I would just use the pop tiling extension. Plasma is also difficult, but again, krohnkite or bismuth are easy enough it’s not worth it imo.
Cinnamon has literally nothing. It’s the best DE for ab openbox style imo, but the worst if you have even the slightest inkling to tile. It will do two Windows snapped together very nicely though.
And yes, I’ve tried tiling everything lol.
There is. DEs are not inherently designed to do this at all. As you’re already aware of since you’ve seen that there is conflicts.