I'm partial to:
Subeshi Archers-unarmored, awesome range, limited AoR
Syrian Archers-armored, good attack, limited but centrally located AoR
Cretan Archers-armored, good attack, decent melee, very limited AoR
Indian Archers- unarmored, decent attack, decent range, AP melee weapon, limited AoR on the fringe of the map

Peltastai- great AoR, decent missile, good melee
Rhodian Slingers- great range, very limited AoR, haven't used them much, but I'm pretty happy with 'em, best slinger on the Eastern half of the map (haven't really played on the west side yet)

Yuezhi Horse Archers- unarmored, standard missile attack, extremely long range, very limited AoR