I watched a Watchmojo video about this topic, and is trash, as usual. I’m curious to see what might be your top darkest moments in the franchise, including when Obi Wan was slaved, the Krell’s friendly fire set up, Order 66 from Ahsoka’s perspective, the many times torture was shown, the ending of The Empire Strikes Back, the fact that Revan was imprisoned for centuries leaving his wife and child behind, etc.
Tarkin blowing up an entire planet as a demonstration is really dark when you think about it.