For those interested, these are heroes with unique appearance.
Heroes with full unique model:
Achilles - Phthia - Faction Leader
Aeneas - Dardania - Faction Leader
Agamemnon - Mycenae - Faction Leader
Hector - Hector of Troy - Faction Leader
Menelaus - Sparta - Faction Leader
Odysseus - Ithaca - Faction Leader
Paris - Paris of Troy - Faction Leader
Sarpedon - Lycia - Faction Leader
Hippolyta - Hippolyta's Amazons - Faction Leader
Penthesilea - Penthesilea's Amazons - Faction Leader
Ajax - Salamis - Faction Leader
Diomedes - Argos - Faction Leader
Heroes with unique generic model variant:
Aegisthus - Mycenae
Lycomedes - Lycomedes' Dolopians - Faction Leader
Teucer - Salamis
Glaucos - Lycia
Idomeneus - Knossos - Faction Leader
Nestor - Pylos - Faction Leader (with young variant from tutorial)
Orestes - Mycenae (received from Epic Missions)
Ajax the Lesser - Narykos - Faction Leader
Deiphobos - Troy
Helenos - Aethria - Faction Leader
Meriones - Knossos
Patroclus - Phthia (received from Epic Missions)
Troilos - Ilion Imbrasos - Faction Leader
Agapenor - Arcadians - Faction Leader
Alcinous - Phaiacians - Faction Leader
Menestheus - Athens - Faction Leader
Mynes - Teraia - Faction Leader
Oileus - Minyes - Faction Leader
Phaenops - Ilion Hyrtacidae - Faction Leader
Telephos - Mysia - Faction Leader