Hi 843rphyllis!
to ATP. I'm glad Catherine jumped in; it's sage advice. You have such a wonderful setup with an amazing number of possibilities. That, perhaps, is why few have been eager to enter into this conversation. As a dear friend here reminded me, the garden should really be about pleasing the one who tends it and not for others, so do have fun and plant what you like.
Here's some of the typical stuff. Plant in groups; odd numbers are often good. This way your bed(s) will have a focal point when bloom time comes. Aim to have plants that bloom at various points in the season. Don't be afraid of the evergreens. They are particularly nice come winter. As for colors, many like to grow flowering plants that are close in color, such as pinks and violets near to each other. So think of the rainbow wheel -- ye ol' ROY G BIV -- and you can go from there. Others I know like the more thrilling combinations, that really aren't all that close, such as bright reds and deep purples.
The best thing is that things can always be moved and shuffled about. In my experience, that accounts for a lot of garden time.
As for the rose question, check the rose forum. Those folks would be well equipped to help out. I have many a visit from deer, so roses don't work for me.
Have fun, and take lots of pictures. I'd love to see how you make out, and I'm sure others would be very interested too!