The Oilers are trying to move into contender status, they don't need the type of forwards that Anaheim has (young, emerging), and Anaheim needs those guys anyway, so the only trade that makes sense is to make a move for Gibson, but there are conflicting reports on what his status is in Anaheim. If he asked for a trade last year like was reported, I could see a trade working between the two teams, but if not, Anaheim just gets worse by trading him and having no goalie of the present to take over from him, so I don't think there is much to discuss between these two teams outside of "how many first rounders is fair for Gibson".
Yamamoto isn't the centrepiece to any significant trade right now. He's a likable player, but isn't going to have a ton of interest due to his lack of size and inconsistent production.