What's your priority? All of the capital ships have their advantages/disadvantages. I personally run Tarkin, so I try to flank him with as many Empire ships (Tie Fighter/Advanced/Reaper) as possible, and compliment it with some of my other strong ships that have uses like Scimitar (stealth), Biggs (taunt), FOTP (hits like a truck) etc.
If you're focusing on light side, there are plenty of options like Ghost/Phantom, Fives and of course the X wings like Poe, Wedge, Biggs being solid choices.
(Note - for ships, my priority is arena so I can keep a steady flow of zeta mats going)