Question: Are Meg Myers and a founding member of American rock band Wavves considered singer-songwriters?

Context articles: Wavves discography
Demon to Lean On
V (Wavves album)
Matt Hollywood
Meg &amp; Dia
David Denny (musician)
Ethan Allen (music producer)
You're Welcome (Wavves album)
Meg Myers
Wavves

The following is the discography of Wavves, an American rock band, formed in San Diego, California in 2008 by singer-songwriter Nathan Williams.
"Demon to Lean On" is a song by American rock band Wavves, released on January 29, 2013, as the third single from the group's fourth album, "Afraid of Heights" (2013).
V is the fifth studio album by the American rock band Wavves.
 The album was released on October 2, 2015 through Ghost Ramp and Warner Bros.
 Records.
Matt Hollywood (born June 11, 1973) is an American indie rock guitarist and singer.
 He was a founding member and leader of the Portland-based indie rock band The Out Crowd, as well as a founding member of the psychedelic rock band The Brian Jonestown Massacre.
 He currently fronts the drone rock band The Rebel Drones.
Meg & Dia was an American rock band formed in 2004.
 It was founded by sisters Meg and Dia Frampton before becoming a five-piece act (renamed Cowards Courage and released the CD "Straight Out of a Story Book") with additional members Eddie Friends, Ryan Hardy, Jon Cash and Alex Kruse.
 With the departure of the additional four, Meg & Dia hastily reverted to their root name with additional members Nicholas Price, Jonathan Snyder (formerly of Madison) and Carlo Gimenez.
David Denny (born February 5, 1948, Berkeley, California) is an American rock guitar player who was a founding member of Frumious Bandersnatch, a seminal psychedelic rock band from 1960s San Francisco.
 Denny was a member of the Steve Miller Band, playing on 1977's "Book of Dreams", "Greatest Hits 1974-1978" (released in 1978, sold over 13 million copies), and 1993's "Wide River".
 Denny wrote the hit song "The Stake," which was on the "Book of Dreams" and "Greatest Hits 1974-1978" albums.
 While running a Mission District studio during the late 1980s, Denny contributed his guitar and vocal talents as a founding member of the Bombay Crawlers and played several Bay Area gigs with the swampy, powerful rock ensemble.
 He later released two solo albums, 1991's Diesel Harmonics and 1997's Louisiana Melody.
 David Denny and his ex-wife Kathy Peck (Executive Director and Co-founder of H.E.A.R. and former bass player with The Contractions) are artists, songwriters, film score composers, and music publisher owners of Monima Music.
Ethan Allen is an American record producer, mixer, engineer, writer and musician currently living in Los Angeles, California.
 He is also a multi-instrumentalist and member of the band Gram Rabbit from Joshua Tree, California.
 Some of his credits include Black Rebel Motorcycle Club, Ben Harper, The 88, Tricky, Luscious Jackson, The Cult, Gram Rabbit, Sheryl Crow, Tim Finn, Brant Bjork, Donita Sparks, Meg Myers, Patty Griffin, and Better Than Ezra.
You're Welcome is the sixth studio album by the American rock band Wavves.
 The album was released on May 19, 2017 through Ghost Ramp.
Meg Myers (born October 6, 1986) is an American singer-songwriter, originally from Tennessee.
Wavves is an American rock band based in San Diego, California.
 Formed in 2008 by singer-songwriter Nathan Williams (born June 12, 1986), the band also features Alex Gates (guitar, backing vocals), Stephen Pope (bass guitar, backing vocals) and Brian Hill (drums and backing vocals).