Question: Can both Doug Fieger and David Johansen be described as singer songwriters ?

Context paragraphs:
The David Johansen Group Live: The David Johansen Group Live was originally a promotional-only LP released by David Johansen to help promote his solo career away from the New York Dolls.  The nine tracks from the promotional LP were recorded on July 21, 1978 at the New York's The Bottom Line.  In 1993, a CD was released of the full 18 songs from the 1978 concert.

Doug Fieger: Douglas Lars "Doug" Fieger (August 20, 1952 – February 14, 2010) was an American singer-songwriter-musician.  He was the rhythm guitarist and lead vocalist of the rock band The Knack, and co-wrote "My Sharona", the biggest hit song of 1979 in the USA, with lead guitarist Berton Averre.

David Johansen (album): David Johansen is a 1978 album by the rock musician David Johansen and his first solo album following his tenure as lead singer of the New York Dolls.  The album was released on Blue Sky Records, a sub-label of Columbia Records that was associated with Johnny and Edgar Winter.  "David Johansen" also features fellow New York Doll guitarist Sylvain Sylvain, who was a member of the David Johansen Band at that time.  Sylvain co-wrote four of the songs with Johansen.  The single from the album was Johansen and Sylvain's "Funky But Chic", backed with "The Rope (The Let Go Song)", which has been included as a bonus track on the CD.  "David Johansen" was voted the tenth best record of 1978 in the Pazz & Jop, an annual poll of American critics published by "The Village Voice".

David Johansen and the Harry Smiths: David Johansen and the Harry Smiths is the first of two albums David Johansen released with the "Harry Smiths".  The first of the two albums was released in 2000.  David Johansen created the album following a folk scene that was taking place in the late 1990s in New York City clubs.  Inspired by the 1997 reissue of "The Anthology of American Folk Music" (a compilation of 1920s and 1930s country and blues recordings assembled by musicologist Harry Smith), Johansen and a named his band "the Harry Smiths" and recorded and performed songs from, or inspired by, the Anthology.

Buster Poindexter (album): Buster Poindexter is an eponymous album released by RCA Records in 1987 by Buster Poindexter, the alter ego of New York Dolls frontman David Johansen.  Johansen re-recorded the track "Heart of Gold" as Buster Poindexter, which originally appeared on Johansen's 1981 solo album "Here Comes the Night."  The song "Hot Hot Hot" was a Billboard single and received heavy play on MTV.

Live It Up (David Johansen album): Live It Up, released in 1982, was the first live album released by David Johansen as a solo artist.  Johansen did release a limited and promotional live album, "The David Johansen Group Live" in 1978, but the album was not officially released until 1993.  Additionally, by the time "Live It Up" was released, various bootlegs of Johansen's first band, the New York Dolls, were being heavily traded (an official live album would eventually be released in 1984).  The impact of the New York Dolls, as both an influential band and as a live act, was becoming a legend in the late-1970s and early-1980s when Johansen was trying to start his solo career.  However, his three previous solo albums were not selling as well as expected, therefore, Johansen turned to touring and selling his stage show.

David Johansen: David Roger Johansen (sometimes spelled "David Jo Hansen"; born January 9, 1950) is an American singer, songwriter and actor.  He is best known as a member of the seminal protopunk band the New York Dolls.  He is also known for his work under the pseudonym Buster Poindexter.

Sweet Revenge (David Johansen album): Sweet Revenge is a 1984 album released by David Johansen and the only Johansen album to be released on the Passport Records label.  Following "Sweet Revenge", Johansen switched his music career into his alter-ego, Buster Poindexter.  For the next fifteen years, Buster Poindexter would remain in the forefront of Johansen's music career.

Shaker (album): Shaker is the second and final album David Johansen recorded with the Harry Smiths.  The album was released in 2002 by Chesky Records and continues highlighting the folk style music from the previous album, "David Johansen and the Harry Smiths".  Additionally, the album brings in blues music with songs from Son House, Muddy Waters and Charlie Patton.

Buster's Spanish Rocketship: Buster's Spanish Rocketship is the fourth and final album from Buster Poindexter, the alter ego of singer David Johansen.  Following "...Rocketship", David Johansen returned to recording albums under his real name.

Supporting paragraphs: Doug Fieger David Johansen
Answer: yes