Question: The Stanley Brothers were an American bluegrass duo made up of Ralph Stanley, and which bluegrass music lead singer, songwriter, and rhythm guitar player, he formed his band together, with his brother Ralph?
Context: The Lonesome Pine Fiddlers (1938- 1966) were an early bluegrass band which included such notable "first generation" bluegrass musicians as Ezra Cline, Bobby Osborne, Paul Williams, Melvin Goins, Charlie Cline, Curly Ray Cline, Larry Richardson and for a short time Jimmy Martin.  The group was started by Ezra Cline and Curly Ray Cline and was originally named "Cousin Ezra and the Lonesome Pine Fiddlers".  The Clines came from a large family consisting of musically talented people.  Ray and Charlie's father, Charlie, was a talented banjo player and the women in the family, Geraldine and Bobbi, were great singers.  For reasons unknown, Bobbi and Geraldine never joined the band on the road but often joined in at home, especially when notable Country singers, such as Bill Monroe, Lester Flatt and Earl Scruggs, and Hank Williams, came visiting.  None of them ever had a music lesson yet excelled on every instrument they touched.  Natives of the Gilbert Creek region of southern West Virginia, Cousin Ezra, along with brothers Ireland (Lazy Ned) and Curly Ray Cline, were part of the original Lonesome Pine Fiddlers from about 1938, a group that worked on radio at WHIS Bluefield, West Virginia.  During World War II, Ned was killed in action.  When the Pine Fiddlers resumed regular daily broadcasts, Charlie, who played multiple instruments, joined them on a regular basis.  Charlie returned to the Fiddlers briefly before becoming a member of Bill Monroe's Blue Grass Boys.  During 1952-1955, Charlie worked off and on with Monroe, recording some 38 songs, all on Decca.  It has been said that he played every instrument at one time or another in the Monroe group except mandolin.  Charlie spent most of 1953 back with the Lonesome Pine Fiddlers working at WJR radio in Detroit.  When Ezra brought the band to Pikeville, Kentucky, in November, Charlie rejoined Bill Monroe.  In 1954, Charlie did a session, playing lead guitar, with the Stanley Brothers and also another one on RCA with the Fiddlers, although he was not otherwise working with them at the time.  He also worked briefly as a sideman with the Osborne Brothers, although he did not record with them.  By 1958, Charlie (electric lead guitar) and his wife, Lee (electric bass), had rejoined Ezra and Curly Ray in the Lonesome Pine Fiddlers, who were experimenting with a more modern sound and working a TV show in Huntington, West Virginia, in addition to daily radio in Pikeville.  In his later years, Charlie was with the Stanley Brothers.  Curly Ray also played with the Stanley Brothers at a different time as their fiddler.  Curly Ray was one of the best fiddlers in Bluegrass.  This most talented family of musicians were the best, surpassed by none.  Finally, on October 1, 2009, The Lonesome Pine Fiddlers got their due when they were inducted into the International Bluegrass Hall of Fame at the Ryman Theater (the original home of the Grand Ole Opry).  Bobby Osborne, Melvin Goins and Paul Williams were there to receive the bands award.  In the crowd of a sold out theater was the son of Ezra Cline, Scotty Ireland Cline, who recalled being in that same theater as a child sitting on stage and watching the Fiddlers play.  (At the time, the Opry had bleachers for family just off stage).  The final act of the evening at the IBMA Awards was the playing of "Pain in my Heart" by Osborne, Goins and Williams along with a Song from the Dillards, who were also inducted the same evening. The Huck Finn Jubilee Bluegrass Music Festival or simply The Huck Finn Jubilee is an annual three-day bluegrass event held in Ontario, California.  It is held during the second weekend in June at the Cucamonga-Guasti Regional Park and features RV and tent camping, traditional "Americana" activities, and live bluegrass music.  The festival also features activities, such as greased pole climbing, tomahawk throwing, pie eating, river rafting, and arts and crafts.  The event is also the West Coast’s biggest bluegrass festival, with acts such as The String Cheese Incident, Ralph Stanley, Steve Martin & the Steep Canyon Rangers, and Rhonda Vincent.  On September 30, 2016 the Greater Ontario Convention & Visitors Bureau announced that 2016 would be the last festival sponsored by it at the Cucamonga-Guasti Regional Park. Carter Glen Stanley (August 27, 1925 – December 1, 1966) was a bluegrass music lead singer, songwriter, and rhythm guitar player.  He formed "The Stanley Brothers and The Clinch Mountain Boys" band together with his brother Ralph.  The Stanley Brothers are generally acknowledged as the first band after Bill Monroe & the Blue Grass Boys to play in the bluegrass genre.  According to some historians, their recording of "Molly and Tenbrooks" (aka "The Racehorse Song") marked the beginning of bluegrass as a genre. The Stanley Brothers were an American bluegrass duo made up of brothers Carter Stanley (1925–1966) and Ralph Stanley (1927–2016).  Ralph and Carter performed as The Stanley Brothers with their band, The Clinch Mountain Boys, from 1946 to 1966.  Ralph kept the band name when he continued as a solo after Carter's death, from 1967 until his own death in 2016. He was born in New York, NY.  In his early teens he became enamoured with Bluegrass music and publicized and promoted that genre in many ways.  He was a DJ in New York, New Jersey, and Virginia; he wrote liner notes for around a hundred recordings.  In 1994 and in 1998 he received the International Bluegrass Music Association's award for best liner notes, and that organization's certificate of merit in 1988.  He compiled the country music chart for Billboard magazine.  He MC'd at many a bluegrass performance or festival, including Bill Monroe's Bean Blossom Festival in Indiana, and festivals of Ralph Stanley and Carlton Haney.  He served as editor for Muleskinner News and wrote many articles on early bluegrass performers for that and other publications, including Bluegrass Unlimited. George Shuffler (April 11, 1925 – April 7, 2014) was an American bluegrass guitar player and an early practitioner of the crosspicking style.  During his career Shuffler played with The Bailey Brothers, The Stanley Brothers and Ralph Stanley's Clinch Mountain Boys.  He was a 2007 recipient of the North Carolina Heritage Award and in 2011 was elected to the International Bluegrass Music Hall of Fame. Leslie Keith (March 30, 1906 – December 28, 1977) was an American bluegrass musician.  Known as a formidable fiddler who won many contests, Keith once played with Ralph Stanley and the Clinch Mountain Boys, as well as The Stanley Brothers.  He is best known for the tune he put together out of pieces of older tunes, "Black Mountain Rag". The International Bluegrass Music Museum (IBMM) is a bluegrass music museum in RiverPark Center near downtown Owensboro, Kentucky, United States.  The museum has inter-active exhibits, posters, costumes, live instrument demonstrations, and the International Bluegrass Music Hall of Fame.  The museum has 2004 m (21,000 square feet) of exhibits and offices on 2 floors.  As a non-profit group, the International Bluegrass Music Museum has raised funds with the help of famous bluegrass musicians such as Ricky Skaggs and Ralph Stanley. Ralph Edmund Stanley (February 25, 1927 – June 23, 2016), also known as Dr. Ralph Stanley, was an American bluegrass artist, known for his distinctive singing and banjo playing.  Stanley began playing music in 1946, originally with his brother Carter as part of The Stanley Brothers, and most often as the leader of his band, The Clinch Mountain Boys. Peter "Pete" Van Kuykendall (January 15, 1938 – August 24, 2017) also known as Pete Roberts, was an American bluegrass musician, songwriter, discographer and a magazine and music publisher.  He was a co-founder of "Bluegrass Unlimited" magazine and its editor since 1970.  He was instrumental in the formation of the International Bluegrass Music Association (IBMA) in 1985 and the International Bluegrass Music Museum (IBMM) in 1991.  In 1996, he was inducted into the International Bluegrass Music Hall of Fame.
Answer: Carter Glen Stanley