mac1504
Explorer
Tyrion is supposed to be deformed
And yet, Mr. Dinklage went on to win not only a Golden Globe, but an Emmy for his performance. I think an actor's skill and range can more than compensate for any physical differences from the source material.
At first I didn't like the casting choice for Robert either, but after watching the first season, I think they made a fine choice. I believe the show-runners were emphasizing Robert's decline after having won the crown, which he wasn't suited for. I don't think Addy deserves any great awards, but I thought he conveyed Robert's larger-than-life stature more through his presence and acting than in his physical representation.