A Long Time Comin'

"A Long Time Comin'" is the first album by American rock band the Electric Flag, released in 1968. The album has a mix of musical styles, including soul along with blues and rock, with a horn section.
Personnel:
Mike Bloomfield – lead guitar, vocals
Buddy Miles – drums, vocals
Barry Goldberg – keyboards
Harvey Brooks – bass
Richie Havens – percussion, sitar
Cass Elliot - vocal on "Groovin' Is Easy"
and many more.