Suggestions by @ltathena

Sugar Lyn Beard

as Percy the Small Engine in Gallant Old Engine

Sugar Lyn Beard

as Percy the Small Engine in Duck and the Diesel Engine

Sugar Lyn Beard

as Percy the Small Engine in Gordon the Big Engine

Sugar Lyn Beard

as Percy the Small Engine in Toby the Tram Engine

Sugar Lyn Beard

as Percy the Small Engine in The Eight Famous Engines

Sugar Lyn Beard

as Percy the Small Engine in Henry the Green Engine

Sugar Lyn Beard

as Percy the Small Engine in Percy the Small Engine

Sugar Lyn Beard

as Percy the Small Engine in Tramway Engines

Matt Zimmerman

as Percy the Small Engine in Branch Line Engines Again

Sugar Lyn Beard

as Percy the Small Engine in Branch Line Engines Again

David Graham

as Percy the Small Engine in Branch Line Engines Again

Frank Welker

as Geoff the Works Diesel in Gordon the High-Speed Engine

Keith Wickham

as Sir Stephen Topham Hatt III in Gordon the High-Speed Engine

George Takei

as Duck the Great Western Engine in Gordon the High-Speed Engine

Ron Rubin

as Edward the Blue Engine in Gordon the High-Speed Engine

Corey Burton

as Bear the Hymek Diesel in Gordon the High-Speed Engine

Tom Kane

as BoCo the Metrovick Diesel in Gordon the High-Speed Engine

Simon Pegg

as Douglas the Scottish Twin Engine in Gordon the High-Speed Engine

Emilie-Claire Barlow

as Emma the High Speed Twin in Gordon the High-Speed Engine

Katie Griffin

as Philippa/Pip the High Speed Twin in Gordon the High-Speed Engine