Today's favorite plant is Osmanthus x Fortunei 'San Jose'.
It is a hybrid between O. heterophyllus and O. fragrans. It is intermediate between those species in most of its traits. The leaves are longer, slightly more narrow and the spines more abundant and longer than Osmanthus x Fortunei. I would say the flowers are larger too.
In my yard, O. fragrans seems to get a bit more cold damage over winter, generally on the new tender growths, but in the six years it has grown, no major damage over winter.
"San Jose' has a nice "holly" look and is a bit pokey.
It can grow to 15-20' tall and nearly as wide. The white, highly fragrant (it smells like heaven) flowers last for several weeks from October to November. It will tolerate both sunny and shady conditions in moist, well-drained soil.
In Portland, I have also had great success so far with O. 'Jim Porter', O. delavayi, O. heterophyllus, O. heterophyllus 'Goshiki', O. heterophyllus 'Purpureus', O. heterophyllus 'Rotundifolius' and Osmarea burkwoodii.