Their original lead singer- Les Braunstein
BOC would have been a very different band if he had remained in the group. They had a psychedelic hippie vibe when they were known as Soft White Underbelly and even later as Stalk Forrest Group. You can hear his influence in the hidden gem ‘Rational Passional’
https://m.youtube.com/watch?v=QYz9tgtkWFM
He’s a very talented artist who never got his place in the sun. You can listen to some of his recordings on SoundCloud: https://m.soundcloud.com/user-73938945/magdaline
He wrote a biographical book series which covers his time with the band: https://tinyurl.com/2x4bp5br