Question: What role in "The Rocky Horror Show" was played by an actor who also played a character in a musical based on a children's novel?

Context paragraphs:
The Rocky Horror Show Live: The Rocky Horror Show Live is a 2015 British musical performance event simulcast live to cinemas across the United Kingdom and Europe from London's Playhouse Theatre on 17 September 2015.  The Gala performance, in aid of Amnesty International, was the highlight of a two-week run of "The Rocky Horror Show" at the Playhouse from 11–26 September, all starring the show's creator Richard O'Brien.

The Rocky Horror Glee Show: "The Rocky Horror Glee Show" is the fifth episode of the second season of the American television series "Glee", and the twenty-seventh episode overall.  It was written by Ryan Murphy, from a story by Murphy and Tim Wollaston, directed by Adam Shankman, and premiered on Fox on October 26, 2010.  The episode features the glee club paying tribute to the 1973 musical "The Rocky Horror Show", with elements of its 1975 film adaptation "The Rocky Horror Picture Show", by staging it as a school musical.  While cheerleading coach Sue Sylvester (Jane Lynch) attempts to sabotage the production, glee club director Will Schuester (Matthew Morrison) dwells on his feelings for guidance counselor Emma Pillsbury (Jayma Mays), and club members Finn (Cory Monteith) and Sam (Chord Overstreet) deal with body image issues.  Barry Bostwick and Meat Loaf, who star in the original film, appear in cameo roles in this episode.

Glee: The Music, The Rocky Horror Glee Show: Glee: The Music, The Rocky Horror Glee Show is the third extended play (EP) by the cast of the musical television series "Glee", released on October 19, 2010.  It contains seven songs and accompanies the episode "The Rocky Horror Glee Show", originally aired October 26, 2010 on Fox.  The Halloween episode sees the glee club recreating the 1973 comedy horror musical "The Rocky Horror Show", written and composed by Richard O'Brien.  Dante Di Loreto and Brad Falchuk serve as the executive producers.

Time Warp (song): "The Time Warp" is a song featured in the 1973 rock musical "The Rocky Horror Show" and in its 1975 film adaptation "The Rocky Horror Picture Show", and , as well as a dance performed during the chorus of the song.  The song is both an example and a parody of the dance song genre in which much of the content of the song is given over to dance step instructions.  The dance is one of the major audience-participation activities during screenings of the film and performances of the show.  It has become a popular song beyond the reaches of the film and show, and is often played at dances and weddings.

Kraig Thornber: Kraig Thornber (born 1961) is a British choreographer, actor and singer best known for playing the handyman Riff Raff in "The Rocky Horror Show" and Grandpa George in the musical "Charlie and the Chocolate Factory".  He is a former member of the National Theatre.

Dammit Janet: "Dammit Janet" is a song/musical number in the original 1973 British musical stage production, "The Rocky Horror Show" as well as its 1975 film counterpart "The Rocky Horror Picture Show", book, music and lyrics by Richard O'Brien, musical arrangements by Richard Hartley.

Tim Curry: Timothy James Curry (born 19 April 1946) is an English actor, voice actor, comedian, and singer.  He is known for his work in a diverse range of theatre, film, and television productions, often portraying villainous roles or character parts.  Curry rose to prominence with his portrayal of Dr. Frank-N-Furter in "The Rocky Horror Picture Show" (1975), reprising the role he had originated in the 1973 London and 1974 Los Angeles stage productions of "The Rocky Horror Show".

The Rocky Horror Picture Show (soundtrack): The Rocky Horror Picture Show is the original soundtrack album to the 1975 film "The Rocky Horror Picture Show", an adaptation of the musical "The Rocky Horror Show" that had opened in 1973.  The soundtrack was released as an album in 1975 by Ode Records, produced by Richard Hartley.

Science Fiction/Double Feature: "Science Fiction/Double Feature" is the opening song to the original 1973 musical stage production, "The Rocky Horror Show" as well as its 1975 film counterpart "The Rocky Horror Picture Show", book, music and lyrics by Richard O'Brien, musical arrangements by Richard Hartley.  The song is reprised at the end of the show, with lyrics that reflect on the final events of the story.

Charlie and the Chocolate Factory (musical): Charlie and the Chocolate Factory is a stage musical based on the 1964 children's novel of the same name by Roald Dahl, with book by David Greig, music by Marc Shaiman and lyrics by Shaiman and Scott Wittman.

Supporting paragraphs: Kraig Thornber Charlie and the Chocolate Factory (musical)
Answer: Riff Raff