Hey, I said no silly ones!
The ones that are already on my list:
- dwarf quarreler (when I asked mrtn, this was the first that he mentioned, so I suppose I can't ignore that

)
- bone chucker (useful for three undead civs as a replacement for fire catapult)
- hellblaster volley (I might postpone this for the sake of the following list).
There are a couple of things that comes to my mind (after seeing LMR!'s list of suggestions) that could be useful:
- harpies (that's a good catch there - for dark elves don't (?) have cheapish flyers)
- furies (for chaos hordes & beasts of chaos)
- carrion (tomb kings don't have any flying units - or do they have that zombie dragon? )
- doom diver (because of the fun factor alone this would be great

- for both greenskins)
- that frikking cold-one chariot (it buggers me that dark elves don't have that ultra-cool looking unit).
Why some of those I just discard for now

:
- squig rider, tomb scorpion, grail knight, snotling pump wagon, more ogres: there's actually not much room for this fella for the mod.
- greater daemons: they're really a pain in the butt to make. No thanks

(altough you are free to make colour edit to the vermin lord to make a lord of tzeench or whatever - IIRC it looks something like that when glanced quickly).
- manticore (who would use that? I think it's just a bit of unnecessary fluff)