Try geranium phaem Margaret Wilson. It has lovely almost white leaves and lavender flowers. Lovely contrast with Heucheras which will do well there too. Try Heuchera berry smoothie or plum pudding next to it.. Very pleasing.
Pulmomarias too....beautiful ome called blue ensign has brilliant blue flowers in spring....and there are some lovely,white flowered varieties.
Brunneras.....I have hadspen cream. ,this has cream splashed foliage and forget menote blue flowers. Bergenias have evergreen,foliage often,splashed with red plus brilliant spring flowers.
Some of the euphorbias too .....blackbird for dark foliage and numerous green and white varieties.
Grasses like hackonochloa, if you can give some water too occasionally, and acorus Ogon and Bowles golden grass.....all needimg some extra water now amd then.
Try the Japanese painted ferns like Ursulas red. Lovely grey/blue foliage amd red stems.