Besides some already mentioned (Shara Jenn, Beryl Thorne, Jakarro, Kai Zykken, Jonas Balkar, Tora, etc.), these would be my picks:
- Lemda Avesta (Makeb, Republic side)
- Dr. Ianna Cel (Republic Taris, also appears on Agent class story)
- Aristocra Saganu (Hoth, Agent class story)
- Captain "Duchess" Sarnova (Dromund Kaas)
- Phi-Ton and Yana-Ton (Agent's "husband" and "wife" from Voss)