Eddard "Ned" Stark
More can be found at http://www.a-game-of-thrones.net/fancast-videos/ . For those who haven't read A Game of Thrones, it really is one of the best things you can read. School had killed my interest in reading by senior year of highschool, too many repeat reads (Hamlet/Romeo and Juliet, I'm looking at you [I still like Hamlet though]), too much bullshit with symbolism and what the author is trying to say, not just reading the damned book, and drawing your own conclusions. Looking at the formula instead of getting lost in the story. As somebody who read LotR in 6th grade, I have to say that the A Song of Ice and Fire series blows it out of the water in terms of story, characters, and politics. LotR had many cool things about it, and was better in a few of it's own, such as the depth and lengths he went to in order to create languages and entire histories for the characters, but outside of Gandalf falling in Moria, the books rarely had me emotionally involved. A Game of Thrones, and the rest of the ASoIaF has definitely given me the most visceral reactions I have ever had to events in a book, and as such, I would highly recommend reading before watching the series in April.
Also, yes, Ned Stark is played by Sean Bean, the guy who played Boromir/the villain in National Treasure/Alec Trevelyan from GoldenEye.