Rock music trivia

If you were born after 1970 or are not familiar with music prior to 1980, you may as well skip over this post entirely.

I refer to bands whose members eventually leave to join or form other bands as 'seed' bands.

Can you guess the name of the band whose various members left to help form or join with Foreigner, Emerson Lake & Palmer, and Bad Company?

I have posted the answer in the comments.