Question: Which singer was a member of a blues band, John McCrea or George Thorogood?

Context paragraphs:
Better Than the Rest: Better Than the Rest is the third album (mini-album) of songs by George Thorogood and the Destroyers, recorded in 1974 and released in 1979.  At the time the songs were recorded, Thorogood was an unknown artist who was not signed to a record label.  In 1979, after Thorogood had released his first two official albums on Rounder Records, "Better Than The Rest" was released by MCA.  In 1986, the songs from this album were released on compact disc with the title "Nadine" using a different track order.

George Thorogood and the Destroyers (album): George Thorogood and the Destroyers is the self-titled debut album by American blues rock band George Thorogood and the Destroyers, released in 1977.  Consisting mostly of covers of blues hits, it included a medley of John Lee Hooker's "House Rent Boogie" and "One Bourbon, One Scotch, One Beer", the latter a song written by Rudy Toombs for Amos Milburn, and later covered by Hooker.

2120 South Michigan Ave.: 2120 South Michigan Ave. is the fifteenth studio album by George Thorogood and the Destroyers.  It was released on June 14, 2011 on the Capitol Records label.  The album peaked at #2 on the "Billboard" Top Blues Albums chart.  The title refers to the address of the offices and recording studios of Chess Records in Chicago.  The album contains ten covers of songs recorded on Chess Records by artists such as Chuck Berry, Bo Diddley, Willie Dixon, and Muddy Waters; plus a cover of The Rolling Stones' instrumental "2120 South Michigan Avenue" and two original songs about Chess Records artists.  Capitol Records approached Thorogood with the idea for the album and selected most of the songs.  Buddy Guy and Charlie Musselwhite perform on the album, although their work was added after primary recording was complete.

George Thorogood: George Thorogood (born February 24, 1950) is an American musician, singer and songwriter from Wilmington, Delaware.  His "high-energy boogie-blues" sound became a staple of 1980s rock radio, with hits like his original songs "Bad to the Bone" and "I Drink Alone".  He has also helped popularize older songs by American icons, such as "Move It on Over", "Who Do You Love? ", and "House Rent Boogie/One Bourbon, One Scotch, One Beer", which became staples of classic rock radio.

Cake (band): Cake (stylized CAKE) is an American alternative rock band from Sacramento, California.  Consisting of singer John McCrea, trumpeter Vince DiFiore, guitarist Xan McCurdy, bassist Gabe Nelson and drummer Paulo Baldi, the band has been noted for McCrea's sarcastic lyrics and monotone vocals, DiFiore's trumpet parts, and their wide-ranging musical influences, including country music, Mariachi, rock, funk, Iranian folk music and hip hop.

John McCrea (musician): John McCrea (born June 25, 1964) is an American singer and musician.  He is a founding member of the band Cake.  He is the vocalist and primary lyricist for the band, in addition to playing rhythm acoustic guitar, vibraslap, and piano.  He also programs drums and does mixing work while he and the rest of the band have produced all of their albums.

Kendall Wall Band: The Kendall Wall Band originally known as the "Kendall Wall Blues Band", was a Canadian blues band formed in September 1983 by award-winning Canadian bassist, vocalist, Gary Kendall and alumnus and collaborator drummer Cash Wall who was the band's co-leader and lead vocalist.  Both Wall and Kendall are former members of the Downchild Blues Band which is commonly known as 'the premier blues band in Canada'.  The addition of harmonica player Bob 'Cadillac Eddy' Adams and guitarist Richard Smyth, completed the band.

Aaron Williams and the Hoodoo: Aaron Williams and the Hoodoo is an American blues/rock power trio, based in Madison, WI.  Led by Aaron Williams (b. 1983 or 1984) on guitar, the band’s sound is likely best described by “Ole Harv” of WVPE 88.1 (NPR) as “blues and roll for the masses.”  Aaron is joined in the band by Eric Shackelford on drums and Z on bass.  365Ink says, “Compared to early George Thorogood, Williams & The Hoodoo have all the fire and swagger of the slide guitarist in his younger days, but with more finesse and way more versatility.”  Pulse magazine adds, “A little classic, dirty blues, a little Black Crowes on speed and a little rockabilly.  Our Pulse Pick of the week!”

More George Thorogood and The Destroyers: More George Thorogood and the Destroyers is the fourth album by George Thorogood and The Destroyers, released in 1980.  An alternate name for the album is I'm Wanted.

Downchild Blues Band: The Downchild Blues Band is a Canadian blues band, described by one reviewer as "the premier blues band in Canada".  The band is still commonly known as the Downchild Blues Band, though the actual band name was shortened to "Downchild" in the early 1980s.  The Blues Brothers band was heavily influenced by Downchild Blues Band.

Supporting paragraphs: John McCrea (musician) George Thorogood
Answer: George Thorogood