When I first heard Martin speak, I also had a feeling it was within the circle of actors I adored, since I was swooning at it (LOL) if not correctly Sean Bean. Suprising isn't it? Patrick Stewart was also the voice of Uriel Septim for crying out loud. xD

And I concure with you, Stephen does resemble Piers a bit in that portrait. Stranger still...I know a friend who looks almost like a splitting image of Oscar Wilde....