http://ultimateclassicrock.com/top-10-r ... eir-bands/
#4 Dennis DeYoung - Styx After a very successful reunion in the mid-'90s, Dennis DeYoung either left or was fired from Styx, depending on which version of the story you believe, in 1999. But making his inclusion on this list officially valid, he was jettisoned from the group in 1979 as tempers flared during the making of the 'Cornerstone' album. The band couldn't find a replacement for him, so he eventually found his way back into the lineup a couple of months later. These days though, there's no love lost — Tommy Shaw recently said a reunion is “unlikely” and that “you only live once and you should be happy.”