However, in the broader sense of the word, I have to agree that such figures as Arthur and Robin Hood, perhaps even the Pied Piper of Hamlin would fit.
I don't think you can consider TV or movies to be myth. Will people 500 years from now remember the tales of Jack Bauer?? Doubtful. But a story like Robin Hood has survived for a very long time (according to Wikipedia the first stories were compiled in the 16th and 17th centuries from ballads of earlier times).