All of the flowers you suggested do have a place in the cut flower market. It will depend on how you sell your flowers.

I sell mixed bouquets and very rarely sell bunches of just one type. This allows me to harvest some of the more irregular flowers for special interest when they could not be sold as a large bunch on their own. In my market I would put bleeding hearts, columbine and the forget me nots in that category. Phlox and foxglove may have some sales as single specimine bunches.

Thanks for the advice. Maybe I am too fixated on finding more flowers that will grow in the shade and should just focus on seeing what I can get for the flowers I am certain will grow there.