As a starter, take a look at Bluestone Perennial's catalog. They sell designs for both shady and sunny borders. I'm not recommending you buy one, but I got some good ideas there for putting together a 20 foot shade border.
The Well-tended Perennial Garden also has some good design suggestions about design proportions such as the maximum height of plants based on the width of the border. Check it out to see if it has anything useful for you.
I think a drift of Japanese irises somewhere in your border would be lovely. I don't know that I would do the whole border in any one plant. And, IMO, as long as some of the plants are evergreen, not all of them have to be. Hope this helps a little.

If you're looking for shrubs, 'skypencil' holly comes to mind so do some dwarf and columnar boxwoods and conifers. There are some possibilities for trees too if you want to know what those are let me know.
I have a narrow strip like that and used some other nice shrubs but they aren't evergreen.

If you have a nice solid background, an espallier camellia might be really nice. It would look wonderful with other shrubs of varying heights.
Don't forget you can manipulate many plants for size too. I have a praugese viburnum which is mostly evergreen and I've pruned it quite narrow to it into an area such as this.

GGG

You could try Nandina domestica 'Firepower' - Heavenly Bamboo. It grows to 2' x 2' at maturity, it's evergreen, great for those who hate to prune! Flushes lime green in the spring, produces no flowers or fruit. In the summer the foliage will become red-tinged, by fall the foliage is bright red! An excellent four season shrub that can take extreme heat. I purchased mine at Home Depot years ago. I wish all of my plants were this easy to care for. I mean, just plant, water until established and forget about them. No maintenance. WONDERFULL!!!

Here is a link that might be useful: Nandina domestica 'Firepower'

Pssst. It's pretty invasive. (Heavenly bamboo) In some places it's a big problem althous some of the varieties are supposedly sterile.

The Nandina 'Firepower' is a clumping dwarf Nandina, not the regular Nandina's that get out of control. I have had it planted in my yard for 10 years. I did put weed blocker on the ground before planting and only cutting an opening where I wanted to put the plant, so I don't have to do any weeding around them.

Here is a link that might be useful:

I didn't mean invasive as in growing aggressivly or spreading vegetatively I meant more along the lines of the fruit are carried into natural habitats via wildlife, wind or water where they take root and displace native vegetation. Do yours produce fruit?

Mine do not produce any fruit.

Here is a link that might be useful: Here's a more descriptive website on the 'Firepower' Nandina

That's good. If you must take a chance with nandina, use one of the non-fruiting and non-flowering varieties.

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Thanks for the suggestions. I was thinking that the dwarf camellia might make a good addition at each end and 1 in the middle. Anyone know a variety that could work?

There is a white dwarf camellia but I can't find it's name, and two pink ones Camellia 'Winter's Rose',Shi-Shi Gashira,

girlgroupgirl

There are many nice evergreen plants that would do well in that strip of land. It would be nice to have a mixed boarder with lots of texture and color rather that a mono species planting (nandina).

I'd think about some moss phlox and candy tuft for the flowering ground covers. Maybe liriope (boring but a good vertical) and iris for height and you could get fancy and underplant with drifts of daffodils.

There are a good number of small evergreen shrubs you could choose, even small box holly makes a nice mound. Just check out the plants light requirements (there might be to much sun for a camellia) If you would like a long blooming well behaved plant you could try the carpet roses.

I agree with Sugar Hill that not all the plants have to be evergreen.
Anyway have fun and mix it up a bit!

I don't think I am getting the picture. Is the sidewalk a public sidewalk that is two feet from the side of your house? Your description did not make the situation clear to me, but it seemed to make sense to everyone else. My first thought was that it is going to take a lot of material to put on 90 X 2 feet.

Yes, the sidewalk is public and runs the whole length of it. I did some measuring and actually have 3 feet in which to plant and it's only 45 feet long. Imagine that.

There will be some shade in the afternoon, but the sun will hit it full force very late in the afternoon. That should be a few hours only.

Since these will be foundation plants, I do want some evergreens in there just so it won't be so naked in the winter - that is should winter come again here in Georgia. Not complaining, just making note that we have been very lucky this year to have such nice weather.

I love the idea of the candy tuft as ground cover. Keep 'um coming folks. This is fun. Thanks, C

There are also dwarf evergreen azaleas. We have them outside one of the buildings at work and for years they have stayed under 3 feet. I know there is a name for them, hopefully someone else will remember it.

I also have a dwarf mountain laurel ('Elf' is the name and there are other dwarf cultivars now). It has tiny leaves that are very glossy. It's only two feet tall and is going to be in full bloom this year, the buds are already set.

I would not plant anything that has a strong root system near the top of the ground as it may breakup the driveway.