Thanks to GrahamB I've completed my cohort of archers, so now my legion stands pretty complete. The only thing now will be adding more legionaries as I feel like it, or until it seems disproportional. Sorry for the poor quality photos, I'll try to get some better ones soon.
LEG. XXIII LUD.

Legio vigesima tertia ludensis, the Twenty Third "Playful" Legion, was stationed in the tiny, almost forgotten province of Dysprosia Ulterior, far distant from Rome and on the very frontiers of the empire. Based near the chief harbour Portus Proficiendum, the Twenty Third would regularly campaign on the borders of the province, in both the cold mountains of the north and the hot deserts of the south. Barbarians, religious zealots, and foreign empires - all enemies of the Playroman Empire faced and fell to the swords of the Twenty Third.

In addition to the main body of legionaries, the Twenty Third boasted a cohort of Grahambian archers, drawn from a Middle Eastern province halfway across the empire.

(Note that I've substituted the Egyptian style daggers for the medieval style ones that come with the archers. They seem much more Roman. I don't know why PM, who otherwise did such a great job with the Roman theme, missed this trick.)
There was also a unit of engineering and artillery troops, and a wing of cavalry.

Finally, here is a picture of the officer corps, with the legatus legionis riding in front on his pitch black steed Nivellius ("Snowy"). The names of the various officers and leaders have not as yet been revealed by archaeology.
In the back, by the command tent, you can see the emperor himself, surrounded by a bodyguard of Praetorians. This particular emperor had a special fondness for Dysprosia Ulterior, and would summer there when he could, indulging in the (to him) trivial local intrigues as a respite from the stressful politicking of Rome.

That's all for now. We have yet to meet some of the civilian citizens of Dysprosia, not to mention the restive tribes and hostile powers. The conflicts and connections among all these people is the very stuff of playhistory!