_Discipline_.
Its first incarnation lasted from 1969 to 1972, with the guitarist as the only constant member. The second incarnation, formed in 1972, managed to hold on to more members, including Yes drummer Bill Bruford. It too disbanded, however, after releasing 1974's _Red_. The third incarnation, including Tony Levin, Adrian Belew, and omnipresent guitarist Robert Fripp, was the group's most commercially successful incarnation, due to albums like _Beat_ and _Discipline_. FTP, name this progressive rock band, which took its name from the lyrics of the title track to its debut release, _In the Court of the Crimson King_.
Its first incarnation lasted from 1969 to 1972, with the guitarist as the only constant member.
{King Crimson}