I don't think we have any evidence pointing to him, and he has that kid, I'd err away from the middle Barnes for now. Do you have anything on Barton other than the deaddrop stuff?
I don't like Stane either, but that's mostly because I think he's an egotist who doesn't know how to run an investigation. He could be someone to look more closely at and there's a reason we're using Ian Malcolm and Sharon Carter for today's detentions. We maybe have more evidence for Isley even if she seems kind of contradicted by some it like the clue piece.
Unless she lied about having the candlestick. idk if anyone's seen it.