Roy Dotrice voiced all of the "A Song of Ice & Fire" books and I think even won some kind of award/Guinness Record for his reading of "A Game of Thrones" for the most voices/accents used in a single production. Easy to do, really, considering the absurdly large number of characters G.R.R. Martin wrote into his story. I can attest that Dotrice did an amazing job. I've gone through all the audio books twice now and I never got tired of listening to him. You can tell he had fun reading them.
As a small side-note, the show-runners gave him a cameo in the GoT episode "Battle of the Blackwater" as the Pyromancer Wisdom Hallyne of the Alchemists' Guild during the big Wildfire scene with the ships and he's done bit roles over the decades.
Truly an underrated talent, that one.
