I did a lot of documentary photography in the USAF and some of it was published WW in the 60s. I continued it at Cape Canaveral, but have done none since. I just do photography now for enjoyment of my leisure hours.
I can't say that in the heat of a hectic moment, I could really use anyone's style except what presented itself for me. You don't walk around and compose an airplane explosion!
So, to me there are no true documentary styles. You see an important event and you make the most of it! You either get it or you do not.
I do not consider portraits documentary in the sense of a documentary photograph unless they are virtually candid. Werner Von Braun posed in front of the first Saturn missile for a photo by one of my guys. I would not call that a Documentary Photograph. Later, when we took shots of the team in action in the blockhouse with Von Braun present, I would consider those candids documentary portraits!
Sorry if this starts a controversy, but I've had it before with Nat Geog photographers at the Cape.