I don't know that much movies. Star Wars (the originals) yes! I would absolutly watch them to educate me. I avoid the others. Maybe they are good from a visual point of view. But they don't correspond to my idea of a space opera.
Maybe try Dune. In my opinion, the story has been filmed too many times. But out of curiosity I watched the first part of the new series. I found it visually quite successful. I think you can learn a lot about light and shadow.
In the contamporary field I love Wedding Date, especially the women's clothes.
And: Valerian and the city of a thousand planets is optically an opulent mix. Worth seeing!
Arcane:
Actually I have not a Netflix-Abo but I may in the future as soon as my husband and I have found enough series there that we want to watch.