it sounds just like my garden we back onto open fields and the wind really is a problem, I have an L-shaped raised beds (to keep football off) and have sun rising at the front of the house like you, I have stipa tenuissima grass which is lovely in the wind you don't need to do anything to it, planted against ferns christata affinis dryopteris a few hosta's, acers, echinacea, iris siberica shirley pope which is a really deep purple, perovskia blue spire, nandina domestica, festuca & heuchera's and have added some other perenials (lupins & verbena bonsaris, penstemons etc. in blue and pink, only planted it last summer and its looking lovely, the grasses really give it some structure and look lovely billowing in the wind, they all seem to have survived the hard winter although did loose a phormium but think that was more due to snow. I do have to stake things quite early on to stop the wind damage. Happy gardening!