The growing culture for most Clematis is similar (sun, regular,water with good drainage, fertilize yearly). Your planting site should be ideal. You mention it is windy, but Clematis should handle that fine, as long as they don't dry out.
The size and flowering time of Clematis do vary, and this also affects how and when they should be pruned, but that is an easy skill to master. You didn't mention a colour preference, but Clematis come in a wide variety of hues. I'll pick some Clematis I know and like, but there are many others with identical care needs.
Using just Clematis, I might suggest a planting like this: a vigorous late spring bloomer such as Clematis montana. I particularly like the pink form, C. montana var. rubens. Then interspersed with this, I would place one or two large-flowered varieties for early summer bloom. Some rebloom a bit in the Fall too. They come in almost every color, I'll pick Clematis x 'H.F. Young' which has breathtaking, large lavender-blue flowers and Clematis x 'Niobe' with deep red flowers. Then to finish off the season with more color Clematis x 'Polish Spirit' which is another vigorous grower that covers itself in purple flowers.
Now, I just mixed pink, lavender-blue, red, and purple, which is the kind of wild colour blend I enjoy, but you could substitute all whites and pastels or anything else you fancy. Besides, they won't usually all be in full bloom at the same time, though there should be some overlap. If you are shying away from mixing in a climbing rose due to thorns, consider thornless Rosa x 'Zephirine Drouhin' with bright pink blooms.
