The first thing I would do is add some edging between the berm and your new patio. Continue to place the edging all the way around this bed. Until plants fully cover the berm, soil will be washed down. I would choose a low, but slow growing plant such as flowering thyme next to the patio and you could use this on the back side of this bed as well. Because plants will be small to begin with, use low annuals like sweet alyssum to fill in between.

In the widest part of the berm on the left side I would put a dwarf shrub. I used a spirea in the mockup below, but you could also use a dwarf conifer for winter interest. Read the plant labels to make sure the shrub will stay small enough for the bed when mature. If a shrub is expected to be 4' wide at maturity the bed should be 4' wide with the shrub planted in the middle.

The rest of the berm is covered with Echinacea (coneflower) and accented by a single Calamagrostis grass plant on the back side of the berm. You may have room for more, but I can't tell exactly how long or wide this bed is. All of the above plants are only hardy in the bottom half of Minnesota. I do think it is important to use plants one zone hardier than the one you live in, and you should visit your local nurseries and talk with people who know which plants grow best in your climate and soil.

Note that I show all the plants at maturity. Once again, there will be bare ground around young plants and the best way to deal with that is to use annuals until the perennials have expanded. Young beds will be more exciting for doing that. Because most plants die back during the winter interplanting between perennials with spring bulbs adds early color, and as perennials leaf out they hide fading bulb foliage.

I wish you had included a photo of the area around the fireplace, but you should repeat one or two plants in all beds around this patio for design continuity.

Here are some ideas:

Thank you again for the detailed suggestions! appreciate this greatly and needed this kind of guidance. here are couple photos on the other side. Berm is about 5ft wide ans 14feet in length. I do plan on skirting the sunroom and mulching in front of it. i will likely just sod at the end of the berm.