I have bought a catnip plant, and will give this a try. This seems
like a fitting plant. I have also planted speedwell, coral bells, and
will give astilbe, queen of the meadow and columbine a try. I have a
rose that has been growing indoors (patiohit) and will see what
happens with this. These plants don't necesarily fill all my
requirements, but from what I have found out should do well in the
shade (?)
Not sure about hosta-there is another one in my garden and it's huge
and not particularly interesting.

Anyway, thanks for the suggestions