You and I had the exact same problem during Classic Edition really .... the released poster is great, but there aren't any good "cast montage" type paintings apart from that, they're all pretty poor.
The saber poster I never liked, but I like how you use it here for what it's worth.
This is the best "saber" cover I've seen, certainly.
The blood poster with Luke and Vader is good for what it is ... but maybe you can come up with a clever way of using the released poster in a way that's different? The "blood red" take on it that you wound up doing for Classic Edition worked. Anyway.
Don't worry about it.
I'd like to also see a version of Empire with that poster you used before, with Han and Yoda and all that. I think I scanned that one in my directory ...
Can we see larger versions of these? I'd be curious to have a close look at how the images are coming off.
Also, it's "Alec Guinness."