Good structural plants

happycottontail

I have been advised to begin planting up my east and south facing borders with structural plants, so I'm looking for ideas for the loveliest climbers and shrubs for the back of the borders, which are surrounded by a 6' high fence.  My colour palette is mainly white, pink and mauve.

I also need to get some structure into the middle of the borders - plants of differing shapes that would be between 3' and 4' tall.

I have some ideas of course, but with your vast experience you can help me to choose the most reliable and beautiful varieties    Fragrance is important to me too!

Thank you!