WM (Edit: compositor, you know what I mean): Hyprland, Wayfire (close second)
I really like how stable and polished XFCE feels, but I've got into tilling/dynamic window managers over the past few years so I just use Hyprland now. It's not as stable and whenever there's a bad commit and I can't be bothered looking into it I just use Wayfire and praise the spinning cylinder and rotating windows for a few weeks.