Posted: 28/10/2017 at 11:21
Are you intending keeping the viburnum pruned? If not, it will simply grow back and fill the space again, so anything planted there will be crowded out.
Difficult to suggest things without knowing more about the space and size, but having said that, Sarcococca might be ok there - evergreen, and it has scented small flowers. I don't grow them, but Daphnes might be suitable and they also have scented flowers. They tend to need some shelter, depending on your location and climate, but presumably the viburnum, and any other planting, might offer that. I have an Osmanthus burkwoodii which is in a similar aspect. It's evergreen, and has small white flowers in late winter/early spring.
Potentillas will happily grow there - good length of flowering though not evergreen or scented.
Hope that offers a few ideas, although there will be many more.