A pergola might just look like clutter. Remove the shutters, they do not belong on a bank of windows. Finish the landscaping. It is a lovely home. Don't fix what is not broken.

I think a pergola will be too much for this house and the shutters need to go a nice red door would work

Your porch is very nice but I agree that the shutters don't work. Landscaping can help you fill in the space left by the shutters. A couple of boston ferns hanging from your porch would be very pretty. A bright color on your door such as yellow would pull it out of the shadow from your porch. I would add some trailing vines like vinca to your window box to add another layer of texture to it.