Gee, let's come up with even more ways to min/max and have Everyone playing the Exact Same characters.

Animal companions from warden
Shalks, netch, bird of prey/deceptive hunter, potentially swarm
Major breach, minor breach, minor berserk/minor evasion, delayed damage, major sorcery/brutality at 0 cost with free regen and purge, regen passives

Shadow from nightblade
Concealed weapon, potentially fear + cloak + shade + refreshing path
Major berserk, minor expedition, major resolve without needing a bar slot, regen passives, minor recovories, invisibility

Living death from necro
Resistant flesh, spirit guardian, potentially tether + renewing undeath + hexproof
Burst heal, hots, purges, 10 percent damage mitigation, regen passives

From this you'll have some insane tools for a solo/1vX kind of build.
Dual wield front bar with ice or resto back bar.

Shalks, concealed weapon, camo hunter, deadly cloak, deceptive hunter, dawnbreaker

Refreshing path, vigor, resistant flesh, netch, renewing undeath/hexproof/swarm, vamp ult/undo/resto ult

I think what I'd do is the same thing I'm planning on doing in Skyrim with mods eventually- make a "Fallen Angel" themed build that uses a combination of spells and defense/healing to enhance the feeling of a character who has immense access to spiritual power and is channeling it through their connection to whatever holy power they were once devout to, but who also dances on the edge of darkness.

I'm not necessarily playing off of ESO's lore in this mental exercise, but instead using what is available to me within ESO to build what I envision the characters power to be like.

Templar - Restoring Light (The light that remains, the past rituals half-remembered)

Sorcerer- Hard toss up between Dark Magic and Storm Calling (The darkness held at bay)

Warden- Animal Companions (For the wings, because aesthetics)

Bonus points if the other classes take on the "class colors" of the first class chosen, so all of the skills take on the gold/white theme of the Templar.

In spite of my combat oriented instincts telling me there might be better combinations, I'd play with this because fun >.>;

The combinations are endless. You could make some really cool builds. Too bad they would never do this.