Xfce's window manager is the best of all I've tried. Maybe not as configurable as e.g. Sawmill, it has a lot of useful functions that are missing from Gnome-based offerings, and from macOS: window snapping, automatic window resizing to grab available space (in several ways), simple automatic tiling, easy putting a window above others, etc. They all can be configured to have arbitrary shortcuts.

Xfce has fewer ambitions to integrate things and have their own everything. It allows you to just work with your apps without distraction.

Most importantly, Xfce is not trying to imitate macOS, but does its own thing, and stays consistent. It has very little magic in it.

Also, bugs are quite few and far between. They do not seem to rush to release new stuff.