Let's see...First Guardian to ever set foot within the Traveler, blazing a trail for every Guardian to follow. The greatest honor a Hunter can earn is charting a path out of the Darkness and into the Light. He also saved Zavala from a final death and stepped up bound himself to the Crown of Sorrows when no one else had the stones to do it. Even Saint was scared he'd see Osiris as a nightmare and be consumed by it. I should also mention that Crow has been doing Vanguard work since season of the Chosen, while every other hunter left the city and stopped reporting in because they were afraid they'd be asked to take the seat of hunter Vanguard. He got Caydes approval and forgiveness, is one of the 'Travelers Chosen' Guardians that can receive visions from the Traveler, and is a natural at tracking enemy movements and running tactical. He also has a degree of compassion that's absent in most hunters. He's overqualified. Hunters like Ana Bray and Micah-10 are held back by their obsessions with gods and machines and Shaw Han is dunning kreuger incarnate. Crow will be a great Hunter Vanguard and even Cayde knew it.