Sarah Gadon as Idril Celebrindal, or possibly Galadriel
Maybe even Celegorm? He could most certainly pull off haughty. And, well, he *is* rather good-looking and Celegorm is called 'the Fair".
Yes I believe he's been mentioned. I agree, he'd be good. I don't have a clear idea of which elf he should play either - could be Gwindor, could be Gildor, could be almost anyone.