Dain Ironfoot

[Haakon]

"Quiet; doesn't say much, gentle in speech. Taciturn but reliable."

I nominate Russell Crowe.
https://www.imdb.com/name/nm0000128/
Age: 55
Height: 5' 11½"

He can be mild while everyone knows that he's also The Gladiator. He'd be perfect as the Dwarf King.

 

[Ange1e4e5]

Clive Mantle

Clive Mantle - IMDb

Clive Mantle. Actor: Alien³. Clive Mantle was born in Barnet, Hertfordshire. He was a chorister in St. John's choir, Cambridge for four years, and a member of the National Youth Theatre for five years, appearing in a total of eleven productions. He trained at R.A.D.A. and has worked steadily in...

www.imdb.com

Age: 62
Height: 6'5"
Roles: Little John in Robin of Sherwood, Dr. Frankland in Sherlock, Dr. Greysteel in Jonathan Strange and Mr. Norrell, Greatjon Umber in Game of Thrones
Clive Mantle has had a long career. He can be loud when he wants (Game of Thrones), more insidious (Sherlock), and grows a great beard.

EDIT: WAS CHOSEN; OK BY EXECS

 

[Haakon]

Vincent Regan.

https://www.imdb.com/name/nm0716490/
Age: 54
Height: 6' 0½"

Welsh actor. Experienced. He's been in 300, Snow White and the Huntsman and Troy.