Marvel Comics Cloak & Dagger mini series from the 1980s has a portrayal of a black teen who stutters. IDK if they've continued the stuttering aspect of the character, but the following page from the character's origin story is pretty powerful. [First time I saw stuttering in a comic : Stutter (reddit.com)](https://www.reddit.com/r/Stutter/comments/p26nr1/first_time_i_saw_stuttering_in_a_comic/)