One of the best captains that I ever flew with in my early years was a Swede who held dual citizenship. After many years flying in Europe, including a stint with the UN flying C-46s in the Congo during the early sixties, he ended up flying CV-240s with my little freight company in the States. He didn't have much time on the Convair, but a lot of time on the DC-6, 727, etc.
Years later, when teaching CRM and new captain ground school courses, I would use this gentleman as an example. I explained that somehow, he never once made me, the first officer, feel that he could do my job better than I could. At the same time, he never once let me feel that I could do his job better than he could.
I never have been certain of how he did that, but it has always been a worthwhile goal.