They'll need to be fairly drought tolerant in wall planters, so try these - they should all survive in a planter:
Helichrysum italicum - The curry plant. Reeks like a pot noodle for six months of the year..

- Sun Pe.
Salvia sclarea - Clary Sage - Sun Pe.
Cuminum cyminum - Cumin, was once supposed to have magical anti theft properties - a must for outdoor grown weed! - Shade An.
Tagetes spp. esp.
Tagetes minuta - Marigolds! Smelly and easy to grow. The Mexican Marigold is the smelliest. - Sun/Part shade An.
Artemesia - Wormwood - get A. 'Powis Castle' if you can - it clips well, stays compact and smells strong. Beautiful leaves too.

Sun Pe.
Santolina chamaecyparissus tomentosa - Cotton Lavender - v. strong smelling, compact, little yellow flowers. Sun Pe.
You can grow most of these from seed..