Just about anything that itsn't bite sized or super aggressive is compatible with polys. If the angels are big enough I'd give it a go, and keep the ornate well fed. Your pic of the tank doesn't work, but the only thing I'd be worried about with an ornate in a planted tank would be the lack of swimming space.
I've got my 16"+ ornate with geophagus and heckeliis.
I've got my 16"+ ornate with geophagus and heckeliis.

