Oh! I did not mean to imply that I thought Tom Hiddleston could only play him as a villain from the start, or that I think the man lacks the range to portray unfallen!Fëanor. On the contrary, I think he would do so brilliantly. I think he brought a lot of nuance to the role of Loki that was not in the script and has to be credited to his work with the directors. And the clips I've seen of him as Henry V are very well done. Can Tom Hiddleston portray a beautiful, arrogant and impatient, yet dripping with charisma, First Age elf? Oh, hells yeah. [And then all the Loki cosplayers will be Fëanor cosplayers and it will be glorious!] Ah-hem.
I just mean that, after portraying so many villains, when he appears on screen, the audience will assume that this character will be a villain. Kinda like when you see a character played by Sean Bean, you don't expect that character to live until the end. There *are* film roles where Sean Bean lives (I think?), but he's often the villain and he usually dies. I think that Ned Stark is the most honorable/good guy role Sean Bean has ever had, and he *did* play that convincingly. It is possible to convince the audience not to see all the past work of an actor in a new project, but some actors are better chameleons than others. An actor like Cary Elwes disappears into the role, and you don't *see* him in it - so you can cast him as Robin Hood, Pope John Paul II or Ted Bundy (he's played all 3 roles). An actor like Jack Nicholson on the other hand...not so much. We might want to look for an actor who has experience with both villains and heroes, or is at least a bit less stringently typecast.
I have not seen Crimson Peak, but it was my understanding that the audience is supposed to be unsure of his intentions at first in that one. The female protagonist doesn't know any better, obviously, but the audience is also meant to think that maybe he's okay? And then of course...not. The trailer screams 'don't trust this guy!' though, and that's what I mean...that even if the script and direction has clever subtlety to it...the first thought when he appears on camera will be, 'oh, that's the villain.'
So far, that is literally the only misgiving I have about casting Tom Hiddleston in this role. I think he'd be brilliant and do an awesome job, and give us all the family angst we want in this season, and all the madness we want in the next. But if someone can suggest an actor who might be less of a give-away....I am willing to consider him!