If your set-up is big they would probably do well. However, they won't flower until they form a large clump. You would also have to be careful in picking the species not only for size considerations, but how wet they like the soil. Alot of the species that occur in closed forest grow on river banks and in boggy areas where the canopy is thinner, as on the whole the genus like bright light. On the other hand the species common around disturbed areas can be much less tolerable of "wet feet". Just some thoughts.