For the arch I would choose Rosa Zephirine Drouhin. I have had one at every house I have lived in and they are wonderful. Heavenly perfume right through to autumn and no thorns. It will live quite happily in shade too. I once grew one on an arch which had the early morning sun for about 2 hours and then was in shade the rest of the day.
For your raised bed I would suggest plants with flowers that look good from underneath: Hellebores; Fritillaria; <span class="genus">Erythronium (Dog's Tooth Violet); Monkshood (NOT with children as poisonous - but beautiful); and lovely Aquilegia. There are masses to choose from and if they are mixed with perfumed plants they will look a delight. Unless of course you are thinking veggies....
<span class="genus">There are lots of lovely alpines to grow on your rockery but I would avoid some like <span class="st">Cerastium Tomentosum (snow-in-summer) as they will take over. Personally I love the Gentians. Such beautiful blue flowers.