I think I am interested in burly-enough-to-be-a-blacksmith rather than muscles-for-days-professional-weightlifter. And while 'tall' is fine, I don't want anyone taller than Turgon for this role (so, under 6'5").
I agree that Rog (well, Rhogrin, now) should be stronger and more 'built' than your average willowy elf. But a broad chest and decent biceps would do that; he doesn't have to look like he belongs in the WWF.
This character has a 'before' and 'after', but he won't be a captive for long (in screentime). He'll be made captive during the Dagor Aglareb (Episode 9), and escape before the season finale (so Episode 12). However, in 'real time', that captivity will likely be more than a hundred years, and we'll show time passing with the construction of Gondolin and Nargothrond. So, it makes sense to cast him on his post-Angband characteristics, and just make him look happier/more carefree before all of that.
Nick suggested Jared Padelecki (Sam Winchester from
Supernatural) for either Rhogrin or Ecthelion. He's 6'4", born in 1982.
https://www.imdb.com/name/nm0655585/
Here's a shirtless/workout scene he did 8 years ago; I think that it's a convincing blacksmith body, but not, you know, anywhere near the same caliber as Bautista or Bjornsson.
(ignore the acting in this scene; there's supposed to be something seriously wrong with his character at this point, so this is him being a cold-hearted soulless killer who doesn't care about anything)
There are plenty of examples of him fighting and using weapons on that show, but the only hammer I could remember is this scene where he gets ahold of Mjolnir. Cole, Moloch, and Demon!Dean all use hammers....but not Sam.
More typically they use knives and
guns.
Edited to add: I can't believe I forgot about the scene where they take pickaxes/sledgehammers to a concrete block wall!
In real life, this was an 18 inch thick concrete block wall. They filmed the scene with these two guys going at it for maybe 1 minute....and they got through all 18". The point of the scene is that they 'fail' to break through, but.... {
Story here}
And there are of course plenty of torture scenes to choose from.
There's this one, if you want stoic defiance (and overall unimpressed by his captors):
And the more mental variety, where his grasp on reality is slipping and he's afraid:
https://www.youtube.com/watch?v=qSCwiwbAmP4
And of course, the guy's been possessed more often than anyone. In this scene, he's got both an angel and a demon in him:
https://www.youtube.com/watch?v=KBz0es8nQHU