All the casting was just superb, but the beauty of George was that we could all see a bit of our pathetic selves, the part we show no one lol, in George. The writing and the actor was just the perfect combination. But if you ask Jason Alexander who the best character was, he says Kramer. Someone, maybe it was Stern, asked him if he was shocked that he never won an Emmy for playing George. His response was that he was shocked every year that Michael Richards didn't win it, because in his opinion no one on TV was even close to him.
But for me, George is Master of His Domain.