To my untrained eye, Adwaita & Raleigh look identical (maybe they're both not installed?), and neither looks right without gtk2-engines-pixbuf.
However, oxygen-gtk seems to look "normal" even without gtk2-engines-pixbuf. (Still generates message:
Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap")
So another solution is to switch theme to oxygen-gtk. I think
gsettings set org.gnome.desktop.interface gtk-theme "oxygen-gtk"
should work but I can't test it with a dispVM. Will try some other time.