[LAU] Lightweight WM that can be used without any issue with audio applications

I switched from Xfce4 to JWM. JWM does work with all apps excepted of QjackCtl. Often I need to kill QjackCtl, because the Connect window always is above all other windows and it's impossible to close it. I don't want to use a tiling window manager or a WM that is nearly as bloated, as DEs such as Xfce4. What WMs do you use? A lightweight DE would be ok too, as long as it isn't unstable and has got no dependencies to GNOME software. Bad coded stuff like Enlightenment is a complete no-go. I want to handle windows with the mouse, they should be free to overlap and I don't want to experience issues, even not issues that happens seldom, workspaces should be editable. JWM is nearly perfect, excepted of the QjackCTL issue.