It may be a good site for Limelight. Less sun normally means less blooms but Limelight will benefit because its immature blooms stay green longer of exposed to less sunlight. Just make sure that it can fit in that location since Limelight can get large. Some mopheads may also do well but you will have to try them out to confirm. Again, the problem will be the possibility of less blooms. Any of the Endless Summer Series and the Forever & Ever Series will do well in Zone 5 but the panicultas (Limelight) and arborescens (Bella Anna, Annabelle) will handle even more cold than that. Keep the soil moist and well mulched; water during dry winters if the soil does not freeze.