T. Rex: Marc Bolan and Steve Peregrin Took were the original members of that, and they're both long dead. Mickey Finn and Steve Currie (glam-era bassist) are also both dead but drummer Bill Legend is still alive.
Joey Molland is still with us from Badfinger...I forget if the drummer's still alive and don't feel like checking.
Everyone in Yes and AC/DC are dead.
I lost count, but all original members of Auberon Suger and His Lusty Trusty Podoboos are probably dead.