William Morgan Sheppard, also credited as W. Morgan Sheppard, was a British actor whose career included several notable voice roles in animation, with one of his most recognized performances in anime being the character Peter Fargason in the series Hellsing. His voice work in this production stands as a key example of his contributions to the anime genre. Beyond his role in Hellsing, his voice acting portfolio included work in various Western animated series. He voiced Captain Archibald Witwicky, a character from the Transformers franchise. While Transformers is an anime-related property in some contexts, this specific role was for the 2007 live-action film and its associated media, rather than a traditional animated series from Japan.

Throughout his voice acting career, Sheppard was an occasional presence in the animation industry, taking on a variety of character roles in both television and video games. His deep and distinctive voice led to roles in series such as Gargoyles, where he voiced multiple characters including Petros Xanatos, Odin, and King Kenneth. He also provided the voice for Lawrence Limburger in Biker Mice from Mars and narrated the introductions and mission briefings for the first three installments of the Medal of Honor video game series, among other game credits. His work in voice acting often saw him collaborating with a wide range of other performers, demonstrating his versatility as a character actor. While his anime-specific roles were limited, his performance in Hellsing remains a notable part of his legacy in the medium.