Not sure what I could add here re: his club career. When I lived in Brazil I saw more of him at club level (they had a retro football show which I really enjoyed) and all I can say is you are spot on re: the Djalma everyone sees is one limited/adapted to having Garrincha ahead and Nilton on the other flank.
He certainly could go on a mazy run and was a superb crosser, it just didn't make much sense for him to do that with Garrincha ahead. There's no point trying to overlap Garrincha and offer him a one-two: he enjoyed taking on defenders 1v1, beating them through a 2v1 was no fun.
That's not to say that would be his main characteristic, he was a defender first and foremost, a supremely gifted one. I actually rate him higher than Nilton myself. Nilton was more of a maverick and has this aura about him being the Encyclopaedia and all that, but the one who looked to me as an Encyclopaedia on how to shut out a flank and provide cover was Djalma. He had the physique, he had the tactical awareness, the technique and, crucially, the resilience and character. He was humble, not flashy, not fussed with the limelight. Supremely confident, he just occupied himself with the business of winning games of football and excelled at it like no other RB ever has IMO.