wow, there's no way I can answer this without difficulty so I'm just going to pick one off the top of my head there are these things called boysenberries they are a sort of mix between raspberry and blackberry

they grow in the PNW some, but I don't know that much about them

Another sweet berry I really like found in this area is called Thimbleberry

I'm also fond of Raspberries, Pineapple, etc. I think a really good life changing flavor combination is Blueberry Pomegranate any time you see a bottled juice I recommend Minute Maid brand they make a mean Blueberry Pomegranate juice blend.

I hope this helps!