Pretty much. I see them moreso as the preservers of the ideals of freedom. Keep in mind there is more to the story with the Devil Fruits and its origin.
The Ds pretty much have a fated narrative that defies time and generations. I’ve been charting the whole course of actions that has lead up to this point in the story.
Luffy is the central D destined to fulfill a grand goal that goes beyond just acquiring One Piece.
Without Gol D Roger’s influence, the Golden Age of piracy would’ve never happened. Gol beseeched another D, Garp to save his child, who despite being his ideological enemy took care of his son.
Shanks, a crew member aboard Roger’s ship managed to acquire Gol’s straw hat and passed it onto Monkey D Luffy after saving his life, instilling within him the dream of becoming Pirate King.
Portgas DAce then managed to save his “brother” Luffy from the clutches of death several times, most notably sacrificing himself at the War of the Strongest stating that he knows Luffy will become Pirate King before he died.
Monkey D Dragon, Luffy’s father saved his son from certain doom at the chopping block and from capture; he also saved Sabo’s life.
Prior to becoming a crew member, Robin saved Luffy from the clutches of death asking the proverbial question, “Why do you fight… all of you, who carry the name of D?”. We then find out that Jaguar D Saul saved her, creating the scenario where she could save Luffy from Crocodile (she also provided the antidote after Luffy was fatally poisoned.)
Silvers Rayleigh, the First Mate of the Pirate King, also saved Luffy multiple times and trained him. Rayleigh believes he is more than capable of inheriting his former captain’s title.
Trafalgar D Water Law saved Luffy from a mortal wound by the hands of Akainu and recently formed an alliance with Luffy.
This is more than just mere protagonistic luck, the decisions of each D has affected the hearts and minds of people- in order to fulfill a mission that is transcends them all. A force of fate the World Government has spent 800 years trying to control. This is why Akainu was so adamant in trying to murder Luffy.
The only D that doesn’t fit the narrative is Marshall D Teach, who seems like a virus of sorts in the story.
Spoiler
I wouldn’t be surprised if a D is responsible for saving Doflamingo and Rocinante.