Night Elf Paladin and Dracthyr Death Knight, or basically anything Dracthyr like someone else said in the thread.
Void Elf Druids, Paladins & Shamans
Purple Glowies
They have plenty of lore reasons for druid too.
I’m looking forward to Pandaren druids the most. Hopefully, they will utilize the fact that the August Celestials are actually Wild Gods, and make their forms reflect that.
Bear form:
Black Ox Niuzao form
Could either be a full ox, just like the one we saw in Vale of Eternal Blossoms, or a bear form that has ox-like features, including horns, color, and glow.
(I don’t think they should have a panda bear form for bear form, because that would be like a human druid that shapeshifts into a human. They need to actually shapeshift into a different form, panda bear form wouldn’t do that.)
Cat form:
White Tiger Xuen form
Electric white cat, fairly obvious one here. Also has the glow of course.
Moonkin form:
Red Crane Chi-Ji form
This one could use the same skeleton as the Zandalari druid moonkin form. Their head would be the head of a crane and they would have crane wings with long spindly legs. Give it the same glow that Chi-Ji has around them.
Tree form (the talent one):
Jade Serpent Yu’lon form
I thought it would be really cool to break tradition here and not actually give them a tree at all, but a coiled jade serpent instead. Once again, it needs that signature glow too.
Travel form:
Goat
Make it the kafa-crazed variety just for fun. Red eyes would be a nice touch.
Flight form:
Pandaren phoenix
Think Ji-Kun.
Swim form:
Sea Turtle
The intro island for Pandaren is a giant sea turtle, this one feels right. Plus, Tortollans (kinda).
It’d be more like if the “bear” form for humans were gorilla.