It is very difficult to get anything to grow under a conifer as they have lots of roots near the surface that steal all the water. One plant that I have that does grow under a conifer and is evergreen is periwinkle (Vinca). Mine is Vinca Minor with lavender blue flowers and it's a bit of a thug to keep from spreading into the rest of the border, but you can get bigger leaved and flowered ones, Vinca Major and there is also a variegated one.
As for shrubs, I have a euonymous fortunei, Silver Queen (I think) under a conifer that is managing OK.