The guy in the beret is Dave Bickler, and no he isn't dead. Jimi Jamison took over as vocalist in 1984 (after "Eye of the Tiger") and recorded and toured with the band for the next 30 years. For many people he was "the" lead singer of Survivor.
Yeah, he had a lot of hits with the band... I never really listened to them, I'm more of a metal head, hard rock guy, but i do know they were good...