[Gothmog]

If we evict Galadriel, would Turin leave Nargothrond? Maybe ha can't stand being around the place his loved lived when she's not around anymore? Whatever we do, to get Turin out of the place is a good idea... If he's gone, people will listen to Gwindor and the warnings of Gelmir and Arminas. Wait, that warning came to late after the bridge was built... Would a destruction of the bridge complete the task?

Anyway, how we're going to get Turin from Nargothrond with his big crush on the ruler there is a mystery to me. Therefore I nominate Galadriel as one alternative.