Question: Which artist is in more bands, Stacey McClean or Hansi Kürsch?

Context paragraphs:
Imaginations from the Other Side: Imaginations from the Other Side is the fifth studio album by Blind Guardian that was released in 1995.  The atmosphere of this album is darker in comparison to their earlier works, such as "Battalions of Fear", which had a relatively light tone.  This album also marks the first since "Battalions of Fear" in which Kai Hansen (Gamma Ray) did not guest on vocals or guitar, and the last album to feature vocalist Hansi Kürsch as bassist.  It was also their first album to spawn off any singles, in form of "A Past and Future Secret" and "Bright Eyes".  It was remastered and re-released on 15 June 2007, with bonus tracks and videos.

André Olbrich: André Olbrich (born 3 May 1967, in Düsseldorf, Germany) is a German guitarist, composer and backing vocalist, most known as the co-founder and lead guitarist of power metal band Blind Guardian, in which he serves as one of the main composers with other co-founder Hansi Kürsch.

Blind Guardian: Blind Guardian is a German power metal band formed in the mid-1980s in Krefeld, West Germany.  They are often credited as one of the seminal and most influential bands in the power metal and speed metal subgenres.  Ten musicians have been a part of the band's line-up in its history, which has consisted of singer Hansi Kürsch, guitarists André Olbrich and Marcus Siepen, and drummer Frederik Ehmke since 2005.

Demons and Wizards (band): Demons and Wizards is a power metal band conceived as a side-project by vocalist for Blind Guardian, Hansi Kürsch, and the guitarist for Iced Earth, Jon Schaffer.  Schaffer writes the music and Kürsch writes the lyrics.  The band's line-up during the recording of their first album in 1999 also featured Mark Prator, who was the drummer on a few Iced Earth albums, and Jim Morris doing most of the guitar solos, Morris also having worked with Iced Earth in the past.

Reversing Time: Reversing Time is the first studio album of the Greek - Turkish band Dreamtone & Iris Mavraki's Neverland, released in February 2008.  Hansi Kürsch (Blind Guardian) and Tom S. Englund (Evergrey) participated in this project.

Excalibur (Grave Digger album): Excalibur is the ninth studio album by Grave Digger and is the final album of the "Middle Ages Trilogy".  It tells about the story of King Arthur and the knights of the round table.  The line-up for the backing vocals to this album included Piet Sielck, Hansi Kürsch, Hacky Hackmann + Boltendahl.

Hansi Kürsch: Hans Jürgen Kürsch, better known as Hansi Kürsch (born 10 August 1966 in Lank-Latum/Meerbusch, Germany), is a German musician best known for being the co-founder, lead vocalist, co-composer, and lyricist of power metal band Blind Guardian.  He was also the bassist in Blind Guardian until the 1998 album "Nightfall in Middle-Earth".  He also provides lead vocals for the band Demons and Wizards.

Jon Schaffer: Jon Ryan Schaffer (born March 15, 1968) is an American heavy metal musician.  He is best known as the guitarist and last remaining original member of the Florida-based heavy metal band Iced Earth, which he formed in 1985 under the name "Purgatory".  He also sings in his side project Sons of Liberty and played guitar for Demons and Wizards, his collaboration with Blind Guardian frontman Hansi Kürsch.

Nuclear Blast All-Stars: Into the Light: Into the Light is a compilation album from Nuclear Blast Records to commemorate their 20 years as a record label.  Produced by Rage guitarist Victor Smolski, with singers Tobias Sammet (of Edguy), Peter "Peavy" Wagner (Rage) - who has also written the lyrics for all songs -, Tony Kakko (Sonata Arctica), Mats Levén (Therion), Marcel "Schmier" Schirmer (Destruction), Hansi Kürsch (Blind Guardian), Andi Deris (Helloween), Oddleif Stensland (Communic), Marco Hietala (Nightwish and Tarot), and Tarja Turunen (Ex-Nightwish).  It features a variable collection of "All Stars" much in the same vein as Roadrunner United.  The whole album was written by Victor Smolski (however, two songs, "In the Picture" and "Slaves to the Desert" – originally "Slaves of the Desert" – are remakes of songs he had already recorded with Mind Odyssey), who also recorded all the guitars, some bass and keyboards.  The drums were done by Volker Schultz and André Hilgers.

Stacey McClean: Stacey McClean (born 17 February 1989) is an English solo singer.  She was part of the S Club spin-off band, S Club 8 and in 2009 took part in the sixth series of "The X Factor".

Supporting paragraphs: Hansi Kürsch Stacey McClean
Answer: Hansi Kürsch