Ah, but to me final cut also means finances and the coming together of the elements. Â Kane was the only film that had all these things going for it. Â Sure, he had final cut on the films you listed, but the resources weren't there to film in the first place, so he was forced to cut corners.
Macbeth had no budget, he had to use old western sets.
Othello was a hodge-podge of cuts because he filmed out of order for 5 years and then had to make it work in the editing. Â Sure, its genius came out of that process, but Orson would have filmed it differently if he had had a choice.
The sets didn't come through for The Trial, so he had to switch to the abandoned train station. Â He was putting the ending sequence together the night before the film opened, so he had time constraints there.
Chimes: Again, barely a budget. Â Filmed like Othello. Â Although, I think it was intentionally this time.
Immortal Story: Final Cut? Â Did he have enough money to not have to cut corners. Â Anyone know?
F for Fake was mostly someone else's footage that he cut together. Â At that point, he was confident that it was his editing style that was the important aspect of his work.
Filming Othello lacks the "traveling to locations" montage, because of permissions (I think), and of course, there was no budget to be as elaborate as he wanted.
Fountain of Youth: Â He didn't want to use stills, I think. Â Other TV shows, I'll have to ask about.
So, IMO, Kane was the only film in which he had not only final cut but money, time, and the fates on his side. Â That doesn't mean it's the best film, but it makes Orson's complaint valid.