Matt Reynolds

I have several cultivars , one that stands out is 'Freisdorfer orange' which is the only one I know to be dioecous/self fertile.  fruits later in the year and can have fruit into autumn  (Cornwall,UK) very tart but tasty , Other varieties taste varies dramatically along with nutrient profile, A good source of omega 3,6 and 9 and bizarrely omega7 which I had never heard off prior to a deep dive on the subject, good for eyesight allegedly. so my tip is get a lot of female cultivars for a range of fruits that taste different and are available at different times. they can all sucker a lot and spread , possibly 'sunny' (early mid fruiter) and 'orange energy '(later fruiter) sucker the most and the male 'lord' suckers running amok, others not so much.

very different height profiles too and varying thornyness.

smallest 1.8m ish to tallest 3m ish.

Tatiania
freisdorfer orange -(dioecious)
Mary
sunny solnechya
Towan
orange energy
goldrain
lord  --(male)

For couch grass I have found that deep mulch, cardboard or weed barrier fabric will take two years to kill it in a no dig way. And the soil will be better for it. There's no other way but to deprive it of light entirely and come back to the area much later.