Yeah, all the greek units that cost around 1300 are excellent. I have to agree with the Keltohellenikoi Hoplitai pick for #1.

Also, I couldn't get an image, but the Cordinau Orca. Even though they're expensive, they're a great deal, and barely ever lose ANY fight with infantry or non-charging cavalry.

- Are a double-duty weapon against the Parthians and their nomadic buddies. Kill the horse archers both in melee and at range. Like their standard Persian Archer counterparts, great with levy phalanx.

- The Cretans' armoured Eastern counterpart. Just great all-around guys in your army, and, if moved to the east to fight the nomads, are simply AMAZING.

- Cost-efficient Greek dudes who can take javelins and throw them right back. They beat most everything that costs the same (except hoplites) and are just great utility guys to have around, even when you have Thorakitai.

- Just as cost-efficient as its lighter counterpart, it takes on most things its cost and wins handily. Also virtually impervious to most missiles from the front.

- Yeah. Available as an excellent mercenary and as cheap but highly effective multi-purpose cavalry around the Pontic steppe north of the Black sea and to the west in Skythia Minor.