Evergreen recommendation for Portland, OR (wet, wet, wet)

If you have some recommendations for some plant types for me, that would be great as I'm not sure what to get. Here are my requirements:
Portland, Oregon. Evergreen shrub/bush/whatever. 2 to 7 feet tall when full grown. Partial sun (more shade than sun).
And now the final requirement that I don't know about - Area is at a bottom of a slope. There is a small spring in the hill that dumps out in this area. The soil in this area is ALWAYS (except for maybe a few weeks in the middle of the summer) very, very wet. For example, the the raw part of the property in this area, skunk weed grows. I transplanted a hydrangea (yes, not an evergreen) there that I got for free and it died. I put some other type of bushlike tree there (also got it for free) there and it died also.
I have some rhododendrons there and some are fine, but some are one their way out. I have one other evergreen bush there that does great (don't know what it is), but want to get something different in there for some variety.
I have since realized that next time when I do plant something there I will dig the hole extra large and make sure I put in a type of soil mixture that drains extra well. I am sure this will help but I still want to put species down in that area that don't mind too much that their roots might be wet all the time.
Thanks, Jess
Keyword: JessJoeMama
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Jess, Perhaps a good option for your situation is Astilboides tabularis, an evergreen that reaches 4.5' high and takes partial shade as well as damp soil. Jadene www.ecologiclandscape.com
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