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Those are all interesting options, but they don't work. You can only base this kind of sentence on reality, and the reality is (1) those were the first people, and (2) they flew non-stop around the world.
We have a fixed pattern to handle the simple past idea in both parts of the sentence, and that's why C works efficiently and accurately.
Of course, the one option that will work is to use a relative clause and say The first people who flew non-stop round the world were Captain James Gallagher and his crew.
(By the way, notice that I capitalized Captain. It was his title, so it should be capitalized.)
My philosophy is that one shouldn't try to complicate elements of a language if it's unwarranted. Simplicity is the key to good communication.
By the way, most of the options you've tried to come up with don't work because their time frames don't work.