Many associate the "gelling" of the Bluegrass sound to have occurred with performer, Earl Scruggs. Scruggs, considered to be one of Monroe's protegees, formed the band "The Foggy Mountain Boys" in 1950. This band, comprised largely of former members from Monroe's entourage, experienced great success with Columbia records during the '50s and '60s. As with all types of music, they met with criticism for changes made to the traditional sound (primarily by Scruggs), and this eventually led to the band's break-up in 1969.
An effort will be made to seek out musicians of this genre to discover their thoughts on who is the true "Father of Bluegrass" as well as an attempt to discover the driving force behind the desire to continue the over half-a-century tradition filled genre of Bluegrass.
Sources and links for more information on this topic:
http://www.ibma.org/
http://www.roughstock.com/history/bill-monroe-and-bluegrass
http://www.spbgma.com/
http://www.bluegrassfestivalguide.com/