#1 Rhododendron possibly. #2 Euonymus. #3 Physocarpus? or Ribes sp. #4 Hydrangea I believe. #5 Ligularia dentata - L. d. 'Desdemona' is the most widely available.

Please can you tell us where this is growing geographically? Is is an indoor or outdoor plant? Is it aromatic? It could almost be etiolated thyme.

Did you realize that there is a forum just for plant ID called Name that Plant? [https://www.houzz.com/discussions/name-that-plant-dsbr0-bd~t_3137[(https://www.houzz.com/discussions/name-that-plant-dsbr0-bd~t_3137) But since you are here, they are one of the forums of dark-leafed Heuchera AKA coral bells. There are a bunch of cultivars (and in this winter-worn condition I am not certain that anyone could ID the exact cultivar). To be most effective, they want to be densely massed together rather than dotted around on mulch, and they should have something nearby with contrasting foliage such as a plant with true green or lime green foliage to help them stand out..

Looks like Vincetoxicum nigrum Black Swallow-wort, an invasive species