I got LXDE up and running. Very easy, and small enough to add beside GNOME.
After booting to Arch, connect to network with wifi/wicd and run $this->bbcode_second_pass_code('', 'pacman -Syu').
Then run the following $this->bbcode_second_pass_code('', 'pacman -S libfm lxappearance lxde-common lxde-icon-theme lxdm lxlauncher lxmenu-data lxpanel lxrandr lxsession lxtask lxterminal menu-cache openbox pcmanfm')You cannot use $this->bbcode_second_pass_code('', 'pacman -S lxde')It errors with package incompatibility because it contains both lxsession and lxsession-lite.
Then run $this->bbcode_second_pass_code('', 'pacman -S pyxdg')which might be unnecessary.
Then you need to move three files $this->bbcode_second_pass_code('', 'mv /etc/xdg/openbox/menu/xml ~/.config/openbox
mv /etc/xdg/openbox/rc.xml ~/.config/openbox
mv /etc/xdg/openbox/autostart ~/.config/openbox')
Then you need to add the daemon to /etc/rc.conf $this->bbcode_second_pass_code('', 'nano /etc/rc.conf')Scroll to the bottom of the file, add lxdm at the end of the daemons line (inside the parenthesis).
Then comment out the Gnome autostart in /etc/inittab $this->bbcode_second_pass_code('', 'nano /etc/inittab')Scroll down to find the lines under # Example lines for starting a login manager and add a '#' in front of $this->bbcode_second_pass_code('', 'x:5:respawn:/usr/bin/slim >/dev/null 2?&1')
Reboot and log in to either of the installed Desktop Environments (LXDE and GNOME) with the Desktop chooser in bottom bar. Only choose LXDE or Gnome, the other choices are not really available even though they are in the drop-down.
The keyboard under Accessories works correctly. LXDE seems to be much more stable and responsive than Gnome.
I still want Plasma Active, but this will do for now.