Hi and Welcome,
You might do well with winter Pansies, which will bloom with even feeble winter sun as long as they don't freeze. They also keep on blooming, as long as you pick off the spent blooms which is a plus if you want ongoing color there.
The lavender and such are Mediterranean herbs so they like it warmer, and quite dry. You may have nice looking foliage on them through the winter but they won't bloom until spring. Rosemary is dependably evergreen and looks pretty even when not in bloom so would make a pretty green background plant for either pansies or cyclamen. Lavender may lose its leaves depending upon how cold it gets.
If you could post a picture of your light well area, and fill in your profile with your location, more ideas might be forthcoming.
