Niri looks promising to me. After I discovered PaperWM I moved on to Material Shell, which was still the best workflow I've come across to date. It was basically gnome with a 2d grid: you could scroll workspaces left and right and then again on the vertical axis. The author sort of abandoned it (it was a Gnome extension) in order to go all in on their own desktop environment with the same concept. I'm guessing that'll take a while to get off the ground.