I would say these are currently the best teams in the game (excluding the Revans, Traya and Malak) and their necessary zetas. Hopefully this is helpful since the OP was sorta vague on what info you were looking for.
Resistance: RJT lead, BB8 RWTP, R2D2 NC & CA
Rebels: CLS IBAT, Han unique, Chewbacca LF
Nightsisters: MT lead, Asajj unique
Bounty Hunters: Bossk lead
First Order: KRU lead
Jedi: Bastila lead, GMY BM, Jolee TLPB
Sep Droids: B1 unique, GG unique, B2 unique
Sith: Palp lead, Sion unique
Old Republic: Carth lead, Mission unique
Ewoks: Chirpa lead
Scoundrels: Vandor unique, Enfys unique
Clones: Shaak Ti lead and unique
Galactic Republic: Padmé lead and unique
