I know you can do conditional formatting for KPI cards, but can you somehow get images/icons in there? If not, any recommendations? I am of course aware of the Image Card.
No, KPI's don't support icons yet but you could use an image card with some logic to create a similar look and feel.
Definitely a useful addition and well worth adding to the idea exchange if it isn't already listed.
On KPI cards, No there is no way you can Insert Image on top of it.