If you find yourself in the Northern reaches of the Willamette Valley, the Oregon City area; the HOS Arboretum on the Clackamas Community College grounds (open most Tuesdays and Saturdays, 9-3) has an established female specimen of Issai and Ananasnaja (Anna), freshly trellised two growing seasons ago, along with a Hayward F&M that you might take a look at for spacial needs comparison. At least there, under the particular placement inputs, the Issai (reportedly self-fertile) is a lot less space needy than Anna or of course the fuzzys.

Or if you find yourself joining the HOS, you might get close to a plethora of hardy source material via volunteering to help collect genetic material, for the Fruit Propagation Fair. When the volunteers travel to the Germ Plasm Repository in Corvallis to collect Pear, Asian Pear, Quince and yes, Hardy Kiwi propagation wood, you would be able to request/get something from the vines there that might otherwise be overlooked. Include that the now-retired Pear Curator might have some insights as to what might be good or interesting in that line. Most likely will be around for a while in transition to share experience/expertise. And you can take a look at how they trellis their 'stems'.

You will find some discussion of Feijoa, a.k.a. Pineapple Guava on this forum. I believe it won't overwhelm a space.  

I'd suggest looking into Haskap, sometimes a.k.a. Honeyberry. 

I don't know how much land you have or the exposures, but I favor Pawpaws. My two named varieties seemed to get larger than other mature trees I've seen. Whether it was more than adequate runoff moisture from nearby structures during the initial 10 or so years. These got to around 18' and 15' in height x 15' around. Taller than seedling trials from the repository planted in the '90's, those maxing around 12', similar caliper, if memory serves, but not taller than the available documentation.