J. Paul Slavens is an American voice actor associated with the Funimation entertainment company, now part of Crunchyroll, known for his work in English dubs of anime series and films. His career in voice acting is one facet of a broader artistic life that includes significant work as a composer, multi-instrumentalist, and radio host based in Denton, Texas. His voice acting credits primarily consist of supporting characters and additional voices in numerous major anime productions.

Slavens has been active in anime dubbing since at least the early 2000s. One of his most recognized roles is that of the fierce Shandian warrior Wyper in the popular series One Piece. He provided the voice for this character in the main Funimation dub of the series and reprised the role for the 2018 special, One Piece: Episode of Skypiea, which adapts the Skypiea arc of the story. In addition to Wyper, he has voiced other characters in the One Piece universe, including Den and the Marine John Giant.

His filmography includes a wide array of other anime titles produced during Funimation's extensive dubbing efforts. He voiced the character Amond in the Funimation dub of the Dragon Ball Z film The Tree of Might. In the series Basilisk, he voiced Amayo Jingorō, and in Case Closed, he was the voice of Stanley Aikman. Slavens has also contributed voices to long-running and popular series such as Fairy Tail, where he voiced the Jiggle Butt Gang Boss, and Fullmetal Alchemist: Brotherhood. His extensive list of credits includes providing additional voices for major hits like Attack on Titan and My Hero Academia, demonstrating a long-standing and versatile presence in the industry.

While his anime voice work is extensive, his career is marked by frequent collaboration with Funimation, the primary producer of his dubbed credits. Notably, he does not appear to have a recurring partnership with a specific director or fellow actor that stands out as a significant pattern in his work. His notable achievements are therefore rooted in the sheer volume and variety of his contributions, helping to populate the English-language versions of some of the most beloved anime franchises with memorable character voices. Outside of voice acting, his achievements include a successful career as a musician and a long-running, award-winning Sunday night radio show on KXT in Dallas, for which he has received multiple Best of Dallas awards from the Dallas Observer.