You are worried about too much ahead.
Farming Tarkin after Kanan is one of the right possibilities.
Vader with ship coins will also do well in the beginning.
Pilot Tie has a farm point in the Cantina and in the ship coin. Emperor and the GAT are preferable but ok.
Shore and the Death Trooper are definitely expensive farms that I wouldn't do at first.
Swap these two troopers for the more accessible Storm and Magna. If you get a real guild Colonel Starck is another option to replace one of them. Range Trooper is now available.
Farm sequence in the canteen is very important. after Erza and Hera the natural is Unmasked Kylo, which comes at a cheap spot and next to his ship.
As for bounty hunters:
After finishing Chopper >>> Boba Fett >>> Stormtropper
Zeb >>> Cad >>> Biggs >>> Ships >>>
Dengar in Guild Store
At the most advanced levels your priority will be bossk and Hounds + Jango as both are the best hunter leaders in almost every situation.