Sorry I have been absent from this forum for awhile. I apologize for not reading the original post more carefully as to the size requirements. Just as a note, Loropetalum chinense is available in two sizes other than jumbo. Purple Diamond tops out at four feet. Purple Pixie at about two feet by two feet. Again, I have no idea if they are winter hardy for you, but if so, they are strikingly beautiful shrubs with four season interest: very showy spring flowers with purple foliage, good blue-green summer foliage, brilliant red coloring mixed into the green in fall, and evergreen in winter. IF they are hardy, Camellia sasanqua Hot Flash and Shishigashira will mature at around 3' by 4' and are shrubs of the highest caliber in my opinion. Good, clean, evergreen foliage and lovely fall/winter flowers. Osmanthus Goshiki with evergreen green/cream variegated foliage is a fairly dwarf shrub, topping out at 3 to 4 feet. It grows so slowly, it could easily be kept pruned to any size you like. Osmanthus heterophyllus Variegata gets larger, but again is a very slow grower, so can be kept where you want it sizewize. It just might be my very favorite shade plant with clean, sprakling white variegation on dark green leaves. It just lights up its space planted among white hydrangeas. Again, I have no idea about hardiness for you with any of these shrubs. One holly I would also recommend is Ilex cornuta O'Spring. It has yellow and green variegated shiny leaves and is gorgeous.

IMO, Lonicera nitida 'Lemon Beauty' will provide better chartreuse coloring than 'Baggesen's Gold', which generally looks pathetic in much shade (and with any age). The Choisya will be more golden than chartreuse but could work and the hebe is very bronze colored and really doesn't care for shade at all. The various gold threadleaf cypresses (Chamaecyparis pisifera var. filifera cultivars) could work also. Ditto Ilex crenata 'Lemon Gem'. And while a green and gold variegation, Euonymus fortunei 'Emerald and Gold' presents an overall chartreuse effect, especially from a distance, and is exceptionally shade tolerant. Other than shrubs, you could look at various lime or chartreuse colored heucheras or heucherellas - 'Lime Ricky', 'Key Lime Pie', 'Electric Lime', 'Alabama Sunrise' or 'Stoplight'. These are evergreen in our climate and require at least partial shade to maintain that coloring. And it is pretty intensely chartreuse!

There are camelias that grow low and wide. Plum yew has a nice evergreen foliage. Indian Hawthorne is pretty, comes in pink or white. Gardenias are always heavenly, but yes...check your soil...perhaps the azaleas got too much mulch and leaves piled upon the stems,they will rot or suffocate...plant them high. Boxwood leaf miner is becoming a big problem, so I'd hesitate to plant them.

The aralia/fatsia japonica we've had growing in full shade and unimproved Dallas clay flowers well, but has never gotten as large or robust as they did in Houston. Winter die back here keeps it less than about 3 ft tall and wide, though it has only recovered half that size after last year's unusually tough freezes. Acuba japonica does much better for us in the same environment. Lots of choices on size with nandinas, but their red coloring will usually not be as good in heavy shade. Nothing prickly with dwarf yaupon holly which will eventually grow to about 4 x 4 ft, but can be pruned smaller. Agree American beautyberry (Calicarpa americana) is a great option if deciduous will work for you. Birds really seem to like the berries - especially the mockingbirds. Turk's cap (Malvaviscus drummondii) is another good one for shade.