lxqt - metapackage that provides entire LXQt DE which should include Openbox, lxqt-panel, lxqt-config, etc
lxappearance - used for setting the GTK theme, icons, cursors, and fonts
lxappearance-obconf - used to get settings for window border in lxappearance
qt5-style-plugins - (name varies per distro - libqt5-qtstyleplugins-platformtheme-gtk2 on openSUSE) provides the option to use GTK theme for LXQt's widget setting
compton - compositor for screen effects and reducing tearing
compton-conf - (optional) for GUI compton config
obconf-qt - (optional) a nicer looking Openbox GUI config