Here is who I *should* have suggested for Elrond, so instead I am putting him forward for Finwë, who is after all one of Elrond's ancestors (hint: *everyone* is one of Elrond's ancestors - the Silmarillion is quite literally his family history).
Enzo Cilenti
http://www.imdb.com/name/nm0162281/?ref_=nv_sr_1
He's almost 42 years old, so perfect age for an older generation elf. He's 6'1" and from Yorkshire and has great presence on film. He should be able to hold his own against Fëanor (for awhile) as his father. I don't know if he's ever had a romantic lead type role, so I dunno about the whole two wives subplot, but he's disarmingly charming in interviews, so I wouldn't foresee any problem there.
(Translation: Any female who is into guys who watched 'Jonathan Strange and Mr. Norrell' noticed this guy, trust me.)
Here he is in 'Game of Thrones' as a slave owner with a random accent:
And here's him in a 'death' scene, as Childermass:
Out-of-character in an interview, so with his real voice:
I'm sure we could shave him to make an elf of him.