I would recommend Dafoe but that would prolly be cheating
That goat man from the witch is a pretty good suggestion tho. But I think he will end up casting a more known face
I'm honestly not sure about that. Eggers was completely fine with casting unknown actors for The Witch when he made that film, as his goal in casting there was to find people that were actually capable of delivering the film's old-fashioned dialogue in a truly convincing manner.
Seeing as how Eggers has already gone on record as saying that he wants to continue the trend from The Witch by being historically accurate to 1830s Germany in his Nosferatu, I wouldn't be surprised if a similar sort of dialogue is present in that film too (and by extension a similar requirement on his behalf in terms of casting)- even if it
is an English language film set in Germany. So it wouldn't be too much of a stretch to wager that Eggers might revisit the casting pool from The Witch again for one or two other key roles in the film.
Chaudhry definitely stands out to me in that he has that sort of body build to play a convincing Orlok and his voice in that scene from The Witch is very memorable. But then again, Eggers has also said that he wants to look back into the old folklores of vampirism at the time for influence too, so who knows how similar or different his vision for Orlok is compared to Murnau's and Herzog's?
But who knows? After The Witch, I do think Eggers could probably get a bigger name for Orlok too if he wanted to.