IMO, I think we have heard more about Greg's past then we have anyone else.
Catherine may be close.
He has told stories about himself more than any other character.
Just off the top of my head: he made bombs, little ones, stole his Papa Olaf's car, parents don't know he's out in the field, he collects coins, etc (I'm sure I'm missing some).
So really we know more about Greg's past then we do the others. Except for maybe Catherine.
We've heard tidbits about the other characters, but not like Greg and his stories. And damn there was continuity in 'The Grave Shift' when Langston was making the corn meal bomb, they had Greg in that scene, which was shocking in and of itself (because it was continuity :shifty
.
Amazes me when they do that. :lol:
However, considering Jorja left and then came back, he should get more screen time then her. Of course, if she's back in the opening credits, that theory will get blown out of the water.
ETA: Let's face it, they forgot what ensemble means after Billy left. He's the one that pushed that.