IMO Clone Wars is one of the best StarWars media (movie, series, etc) made. Its fun, combats are amazing and the story is good even if theres many fillers. It doesnt fully follow the story, but you get pieces of it, so you're never stuck in a neverending story during a whole serie. Characters are great and well acted.
I strongly suggest it for any StarWars fan.
I watched Season 1 of Rebels.... its not as good as CW at the moment, but it continues on its footsteps (story-wise, but like 10-ish years later). I was thrilled at first because you gt to see Darth Vader in action, but not that much. And theres a lot of similarity in some scene from Rogue One and SW:Rebels, mainly the Darth Vader scene where he walks (Darth Vader don't run anyway) in a corridor to get to Princess Leya, copy-paste from a scene in Rebels.