Here’s an idea. If you want to end with TLJ but feel that there isn’t enough closure, you could do one of those montages that are at the end of some movies where we see an image or short scene of each main character and a text that describes what happened to them later in their lives. That way you could use shots from TROS or wherever you want and come up with a satisfying conclusion for each character.
And then perhaps throw in one of these including all the actors from the saga. https://www.youtube.com/watch?v=enAygqfhjCc