Tom Payne
A good actor, known for his role in The Walking Dead. Has the look of an elf.
Galdor will be a minor character, but he will be with us for the whole ride. We need someone with a special look, who people remember. Payne could be that guy.
Eddie Redmayne
I'd like us to give Eddie Redmayne a role in this series but it shouldn't be a main character. At the same time, we shouldn't waste his talent on something too small. Maybe Galdor is just the thing. https://www.imdb.com/name/nm1519666/?ref_=nv_sr_1
Age: 36
Height: 6'0½"
I think both of the above suggestions are good, but I've been thinking about this character and I believe we have to go for someone younger. He's going to be with us for several years after all, and should not look too old at the council of Elrond. So he has to be under 30 today.
One great actor who could be an elf of the Falathrim is George MacKay. I think he'd be great, and be able to make a transition from being young and brave to becoming a wise and cautious old elf. He's been in movies like Pride and Captain fantastic and he's played Hamlet against Daisy Ridley in Ophelia. https://www.imdb.com/name/nm1126657/?ref_=nmls_hd
Age: 26
Height: 6'1"