One of those Three Dog Night guys?? (I can only think of Chuck Negron's name, but I know it's not him. One of the other two?)
Okay JimK. I will give you this one since it's you and you have the right group. This is Danny Hutton from Three Dog Night. Bonus points - can you name the other original 6 members of the band? Four of them are still in the band. You already listed Chuck Negron but he is no longer in the band.