In Greek mythology, Antimachus (Ancient Greek Ἀντίμαχος) is the Trojan counsellor who, bribed by Paris, opposed restoring Helen and even urged killing the Greek envoys Menelaus and Odysseus. Father of Peisander, Hippolochus, Hippomachus, and Tisiphone; when Agamemnon captures Peisander and Hippolochus he refuses ransom and kills them for their father's guilt. Distinct from the Dulichian suitor and from the poet Antimachus of Colophon.
Adapted from Wikipedia, "Antimachus (mythology)" · CC BY-SA 4.0
I.Counsellor against Helen's return
Homer (Iliad 11.122–142) remembers Antimachus as the Trojan who above all hoped for gold from Alexander and would not suffer Helen to be given back to Menelaus; he even proposed death for the embassage. Agamemnon seizes his sons Peisander and Hippolochus in one chariot, rejects their offer of ransom, and kills them in payment for their father's counsel.
Dictys and later prose expand the aftermath: sons sent after Helenus are captured and stoned; Antimachus himself is later exiled in peace negotiations. Keep this Iliadic Trojan apart from the historical epic poet of Colophon.
II.Homonym care
The atlas id antimachus-trojan is Paris' bribed counsellor alone. Distinct from antimachus-dulichium (Penelope's suitor), from the Centaur and Heraclid namesakes on the Wikipedia list, and from Antimachus of Colophon the poet.