You can find various suggestions with a search for "winter bedding plants for usda zone 9" minus the quotes.

this is just one site
http://www.gardenguides.com/116885-winter-flowering-bedding-plants.html

Here is a link that might be useful: winter annuals

Most winter flowering bedding plants, are really better suited to full sun and will not do their best in your shady spot. I think your fibrous rooted Begonias, Primula and Cyclamen are more tolerant of your shade. Al

I don't think Coleus would survive a frost - I live in a zone without frost and I have to treat it as an annual. The wax begonias should be fine. I second the recommendation of primula/primroses.

Also........snapdragons make a good winter flowering plant, if budded or flowering before frost hits.