My standard hedge shrubs for deer have been boxwoods and hollies. Have both the common box and dwarf English in full sun and the deer hate the smell (as do some people)--I really don't smell it in the ground and the dwarf English are very close to house foundation. There many types of hollies available that might be useful as long as you are okay with pruning. (Dwarf Burfordii, China Girl/Boy,)--I wouldn't use "Nellie Stevens" as they get big. One of my favorites is the native Inkberry "Ilex glabra" I believe--very nice conical shape. Have fun!

A Steeds Holly might be nice, they have that conical shape you mentioned. They are a soft touch holly, (no points, no berries) But I personally love Euonymous. There are a lot of varieties to choose from these days. I am partial to the green spire, which grows moderately quickly and keeps a columnar form. There are a lot of variegated varieties as well if you are looking for a little more color. Depending on the variety they can get quite large, which would help provide some shade for your Pieris. And they're hardy!

I have Daphne Odoras and they make it through the winters but NONE of the varieties of Gardenia I've tried (Frost Proof, Chuck Hayes and Kleims) made it through their first winter. So they can call themselves hardy to zone 7 but I'm not buying it, that's why I'm thinking something that says hardy to zone 6 I might trust. The problem with sweetbox and daphne is they aren't summer blooming, that's why I had the gardenia, trying to get some fragrant blooming shrubs in summer. I have too many deciduous trees/shrubs and need more evergreen shrubs around so it doesn't look so bleak in the winter.

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!