The one that comes to my mind is Terry Kantz of Chicago, back when they were a hot Rock/ jazz band. That man was amazing. When he died that band just truned into smaltzy fluff. Too bad because they really had a powerful, unique rock sound when Terry was leading the charge on guitar, vocals, and writting. The man could play rythum and lead and sing all at the same time. I have not heard another band that had the kind of big band sound where horns and guitar punched back and forth like that.