Graham has a tendency to weed out the weak projects designed just for grants and funding and sticks to substantial finds. But at the same time he has a very objective view beyond the official narrative. Unlike most he believes in digging deeper than accepted practice allows, in fact he encourages it.
Hancock eventually comes around to someone else's ideas, if they're sufficiently well explained to him, and as long as there's some reader interest in it. He's not reliable as a first source, imho.
Of course, the same thing was said by George Bernard Shaw about William Shakespeare, that he was a great storyteller, provided that someone had told him the story first. I read that somewhere. :^) And that was before the nimrod Shaw decided that Shakespeare didn't write Shakespeare. Guess it was someone else who had a story told to him or her first...