Absolutely, yes.  Clustering tropical plants together provide all the plants with extra humidity, which is what tropical plants require.  When you search for a plant companion for your Pothos plant, keep the following factors in mind: • Search for a companion planting that has similar needs, e.g., the same type of soil and watering method • Search for a companion planting that is easy to grow • Search for a companion planting with features that will complement your Pothos plant