I don’t know how you can give Lucas all the credit while also giving his collaborators all the credit, unless you’re going to suggest that all his collaborators credit actually belongs to him because he’s the one who chose to collaborate with them?
Historically, you can see Lucas’ abilities as a creator start to fade pretty fast around 1982, when his life started entering into serious upheaval, and his focus turned more to being a CEO than to a creative. It’s why Jedi (and Temple of Doom) seem as compromised as they are, and why the other films with his name attached to them (save for Willow - which didn’t really work) at that point had minimal (if any) involvement from him (Last Crusade, Labyrinth, Howard the Duck, Tucker, etc.)
Part of the reason the Prequels didn’t go the way he wanted them to is because he didn’t really want to write or direct them, and his headspace was completely shifted. He was trying to reverse-engineer a story from a set point, and tried aiming it at children/families without having spent too much time in that world, if any, in the intervening 15 years. Which is probably why we wound up watching a kids movie about bureaucratic malfeasance in 1999. It’s the perfect example of his two halves just smashing together and not really mixing.
THX 1138 was (and still is) a misunderstood satire of capitalism
American Graffiti was autobiography
Star Wars was nostalgia pastiche.
Those are his three. He executed those three ideas brilliantly, and the uniqueness of his voice rang out as strong as it could, and that voice has been echoing ever since. But he had one hell of a backing band behind him, too, and not everybody gets to be a belter for all their life. Or even most of it. Sometimes you shine as bright as you can for a short period of time, and no matter how talented or gifted you are, that’s all you get on your own, and you’d better learn to work with, rely on, and fit in with others if you hope to carry on that path. There’s nothing wrong with that, or with acknowledging that, either. I think it’s fair to say he did that.