Why not the Greek city states instead of the Antigonids?
The Antigonids controlled Macedonia, some Greek cities and Asia minor, it would be hard to find some UHVs for them. The only option is to try and control Alexander's empire, so they ll share a common goal with the Seleucids
but for the Greeks you can find some more interesting goals, eg:
1) control Greece, Macedonia, Thrace, Asia Minor , Sicily, Marseille etc
2) be the most advanced civ by X BC
3) never lose a city before X
or, you can always make a Gothic civ playable

Europe miss late game Civs
edit: trying a Carthaginian game atm ... do I have to control 6 different type of luxurious goods for the 1st condition? cause I have 2 silver and it counts as one luxury