Here are some prominent examples:
* Comics: The most common narrator is an omniscient voice, which is often attributed to Stan Lee (the co-creator of the character) as he was known for narrating many Marvel comics in the past. However, there are also stories where the narrator is Bruce Banner himself or another character in the story.
* TV series (1978-1982): The voice of Lou Ferrigno was used for both Hulk's grunts and growls and for his spoken lines (with limited dialogue). While Ferrigno didn't "narrate" the show in the traditional sense, his voice played a significant role in the show's presentation.
* Hulk (2003 animated series): The narrator for this series was Ron Perlman, who provided a gritty and dramatic voice for the show.
* The Incredible Hulk (2008 movie): While there was no traditional narration in the film, Edward Norton, who played Bruce Banner, provided voice-overs for some of Banner's internal monologues.
* The Avengers (2012 movie): This movie featured no narration, and the Hulk's dialogue was delivered by Mark Ruffalo.
Therefore, depending on the specific iteration of The Incredible Hulk you're referring to, the narrator will vary.