It seems to me that the choice of actor to play Olwë depends very much on who's going to play Elwë. We don't want someone who outshines Elwë. Olwë shouldn't be as charismatic, but charismatic enough to become leader of the Teleri eventually. The two actors must be believable as brothers.
If we for example cast Dan Stevens as Elwë...
...we could perhaps consider welsh actor Gwilym Lee as Olwë...
Gwilym Lee is seen in 'Hollow Crown' (but also in Midsomer murders). A good actor. I think they could pull off playing brothers. They're about the same age.
If we for example cast Dan Stevens as Elwë...
...we could perhaps consider welsh actor Gwilym Lee as Olwë...
Gwilym Lee is seen in 'Hollow Crown' (but also in Midsomer murders). A good actor. I think they could pull off playing brothers. They're about the same age.