The full GP set (including male and female models) is a big endeavor, but with all the new units coming it seems possible. I'm going to pick and rename from what is available. But here is the full list again and some thoughts on each. The thoughts are just ideas. I might see something different that I like more than my original concept.
The Orcs and Goblins don't necessarily need male and female versions, since it is hard to tell the difference anyway. But Man and Sidhe need both sexes for everything except maybe Lich.
Engineer, Merchant, Sage, Alchemist, Artist (Man, Sidhe; and Goblin, Orc for Engineer only) These all use placeholder unit art currently. I'd prefer a real "single unit" graphic (i.e., no cart or camel). Could use anything to signify classes: a hammer, a book, whatever works...
Heldeofol all-purpose non-magic GP (Goblin, Orc) Something that could pass for Merchant, Sage, Alchemist or Artist. These classes are so rare for this race that we don't need unique art. Maybe I can pull some member art from Nomad or What's settlers/workers. (Engineer is common enough for this race that it could use its own Goblin/Orc versions.)
Warrior (Man, Sidhe, Orc) The trick here is that the unit should look reasonably OK at any time in the game with any tech level. It's not possible to do that perfectly, but fighter with a sword and some minimal armor works well enough. For female units, the No-Bikini-Plate-Mail rule is non-negotiable. (I know...sex sells. But it's possible to be sexy and functional at the same time.)
Sea Warrior (Man, Sidhe, Orc [Goblin?]) Sword, no armor or very light armor, with Viking horns. (Goblin with Viking horns?
) [Note: this subclass isn't implemented yet, but will go in at some point.]
Paladin (
Man only) A fancier, holier version of Warrior. I think of them as having shiny silver armor. NBPM rule applies.
Eidolon (Man, Sidhe, Orc) This is the opposite of above. A blatantly evil great warrior. Perhaps with black armor.
Witch/Warlock (Man, Sidhe) This is one sublcass, just different name for female vs male. Female should be something like classic witch with pointy hat (although riding a broomstick is going too far). Maybe warlock needs scullcap. This is the most "primitive" of the arcane spellcasters. Brown and/or black could work.
Wizard (Man, Sidhe) I'm happy with the Gandolf cliché for male. Not sure what is needed for female. These could be good or evil, but in appearance they should pass as good or neutral. Perhaps blue or grey or a grey-blue.
Sorcerer (Man, Sidhe) This is the evil (or at least very ambivalent) counterpart to wizard. I imagine them as the power-hungry kind of spellcaster. Red comes to mind for color.
Illusionist (Man, Sidhe) Something flashy I guess. These spellcasters are all about appearance and perception. Maybe a rainbow of colors? [This subclass not implemented in game yet.]
Necromancer (Man, Sidhe) Black or maybe a deep purple and obviously evil. Not a Lich yet but on the way to that.
Heldeofol all-purpose arcane spellcaster (Orc, Goblin) One unit again serves multiple subclasses since their appearance will be fairly rare. It would be nice to have one Orc unit and one Goblin unit that could pass as Witch/Warlock, Wizard, Sorcerer or Necromancer. Perhaps a small modification of Shaman unit will work.
Lich (Man, Sidhe, Orc/Goblin) Basically an Undead GP. I think Nomad or What posted something that I need to look at. Race and sex are kind of ambiguous in these, so maybe one model will work for all.
Priest (& Fallen Priest) (Man, Sidhe, [Orc or Goblin]) Only Man can generate Priests, but all races can generate Fallen Priests (which are identical in appearance). For Man, Civtar's "Wizard" (black) unit seems perfect to me. Basically a paternalistic old man. Although I always thought of them as more "portly". The female counterpart could be a female shape in the same robe - no beard.
Druid (Man, Sidhe)
Not a paternalistic old man. Should be strong, vital and maybe a little bit scary. Not evil, but not good either. It's basically a "nature priest". Think of Celts. I've grown to like the antler horns in the current placeholder unit.
Shaman (Orc, Goblin) This is the Heldeofol druid unit. Basically still a "nature priest". Maybe a little more primitive and dirty.