Pretty much any clematis you can lay your hands on will be hardy in the PNW for your zone - we are not exactly limited in that regard :-)

For vining clematis, flowering only does occur at the end of the vines. That's just the nature of the plant. If you select a type 3 or hard prune variety, you can develop more of a fullness to the plant by virtue of pruning. But I find that if I keep any clematis to a shorter support system than it will fill and allow it to drape over itself, you can get the effect of a fuller flowering plant. There are some lovely, jewel toned varieties in the type 3's - Madame Julia Correvon, Rouge Cardinal, Etoile Violette, Royal Velours, Gravetye Beauty.

One of the later blooming (hard prune) species type varieties I really like is Triternata Rubromarginata, which produces hundreds of bicolored magenta/white sweet smelling but smallish flowers. Not the easiest of clems to locate but worth the hunt or do mail order.

I had a hard time determining from your description and plant list how much sun this area receives but most of these suggestions would prefer as much sun as possible.

Here is a link that might be useful: triternata rubromarginata

I guess I should just say, we are striving for a cottage look. Your response is quite helpful though! I will be watching the area tomorrow or on the next sunny day to see how long the area gets sun, but it is on the eastern face of our house, and will get unblocked direct morning to early afternoon light, until the sun is directly over the house and shaded in the afternoon. I am betting about 6 hours of full sun. We have our other clematis on the same side of the house, though in a pot, and it has seemed to appreciate the afternoon shade. Thank you for the variety recommendations!!

Two others that I love are Ville de Lyon and Venosa Violacea.