I have confederate jasmine that has filled out on my chain link fence. It has a good sent a few times a year.

Are there any plants that have a root system of only one foot? I think that requirement is really going to limit your options. Is there a barrier down there or are you worried about utility lines? A tall shrub or vine in full sun needs deep roots to maintain moisture.

Sorry I meant depth wise 1 to 1-1/2' from fence to decking. I have a white 5' high aluminum railing w/ concrete columns fence. Not sure if a vine can grow properly with just vertical railing fence, but i am seeking privacy in backyard. If a vine can't provide full privacy then maybe a hedge or shrub that can be maintained in a narrow space , no larger than 18". i.e. I pruned my gold mound duranta and the sides still have not grown foliage back, the sides are just stems and branches(see thru.

A vine/shrub that flowers almost continuously, can be pruned ruthlessly and can grow to be fairly tall (I have one that is over 10 feet) is Cape honeysuckle. No pests to speak of and doesn't need any special soil or fertilizer. No fragrance but the foliage is a nice green and the butterflies and bees like it. Here's a picture:

Julie in West Palm Beach

Your next-door neighbors will not be happy with confederate jasmine unless they want it, too, and I resemble that.
I told my neighbors, fine, plant whatever you want, after all, it's on your side of the fence. The danged stuff grows out about 2 feet over and through the fence on my side and reaches out and grabs anything within 3-4' unless I am vigilant about cutting it back once a week! (Once a week is not my idea of easy maintenance) And the sap is terrible to deal with. And it doesn't smell pretty like the jasmine I had in San Diego.