I have a revised and expanded list for you:
Agrippa, Marcus Vipsanius (64-12 B.C.)
Archelaus of Cappadocia (d. 17 C.E.)
Aretas IV (late first century B.C.E.)
Artavasdes (1) (fl. first century B.C.E.)
Artaxes II (d. 20 B.C.E.)
Augustus
Balbus, Lucius Cornelius (2) (fl. late first century
B.C.E.)
Bathyllus
Cassivellaunus (fl. mid-first century B.C.E.)
Cotiso
Diodorus, Siculus
Dionysius of Halicarnassus
Drusus, Nero Claudius
Epaphroditus (1) (fl. first century B.C.E.)
Fenestella (52 or 53 B.C.E.–36 C.E.)
Gallus, Aelius (fl. late first century B.C.E.)
Herod the Great
Horace
Hyginus, Gaius Julius (c. 64 B.C.E.–17 C.E.)
Juba II (d. c. 19 C.E.)
Junia (d. 22 C.E.)
Labeo Marcus Antistius (c. 54 B.C.E.–10/11 C.E.)
Lepidus, Marcus Aemilius (d. ca. 13 B.C.)
Lepidus, Paullus Aemilius (late first century B.C.E.)
Livia
Livy
Lollius, Marcus (d. c. 1 C.E.)
Macer, Aemilius (d. 16 B.C.E.)
Maecenas, Gaius Cilnius (74/64–8 B.C.E.)
Marcellus, Marcus Claudius (43–23 B.C.E.)
Marcius, Publius (d. 16 C.E.)
Messalla Corvinus, Marcus Valerius (64 B.C.E.–8
C.E.)
Murena, Licinius Aulus Terentius Varro (d. 22
B.C.E.)
Nepos, Cornelius (c. 100–24 B.C.E.)
Nicolaus of Damascus (fl. first century B.C.E.)
Obodas (d. 9 B.C.E.)
Octavia (d. 11 B.C.E.)
Oppius, Gaius (fl. mid-first century B.C.E.)
Ovid (Publius Ovidius Naso) (43 B.C.E.–17/18 C.E.)
Phraates IV (d. 2 B.C.E.)
Plancus, Lucius Munatius (fl. first century B.C.E.)
Polemo I (d. 8 B.C.E.)
Pollio, Gaius Asinius (c. 76 B.C.E.–5 C.E.)
Pollio, Publius Vedius (d. 15 B.C.E.)
Porcius Latro, Marcus (d. 4 C.E.)
Potamon of Alexandria (fl. late first century B.C.E.)
Propertius, Sextus (d. 15 B.C.E.)
Pylades (fl. first century B.C.E.)
Rhoemetalces I (d. 12 C.E.)
Rufus, C. Valgius (fl. late first century B.C.E.)
Scribonia (fl. first century B.C.E.)
Seneca the Elder (Lucius Annaeus Seneca) (c. 55
B.C.E.–41 C.E.)
Sitas (fl. late first century B.C.E.)
Strabo (fl. late first century B.C.E.)
Taurus, Titus Statilius (fl. late first century
B.C.E.)
Tiberius (Tiberius Claudius Nero) (42 B.C.E.–37
C.E.)
Tibullus, Albius (c. 54–19 B.C.E.)
Tigranes II (d. 6 B.C.E.)
Tiridates II (fl. first century B.C.E.)
Titius, Marcus (first century B.C.E.)
Trogus, Pompeius (fl. late first century B.C.E.)
Tubero, Quintus Aelius (fl. late first century B.C.E.)
Tubero, Quintus Aelius (fl. late first century B.C.E.)
Vinicius, Marcus (1) (fl. later first century B.C.E.)
Virgil (Publius Vergilius Maro) (70–19 B.C.E.)
Vitruvius Pollio (fl. early first century C.E.)
*****
Feel free to mention anyone of possible interest, as I set about preparing to get the first of the NPCs created.