Not entirely sure if he was an original member or not, but Derek Bell is no longer with us.
Procul Huius.
The Moody Blues of Days of Future Passed (1967) are all still around. Mike Pinder left in '78 and Ray Thomas retired in '02 but they could have a full reunion. The other three members are still touring.
The Ex-Pistols
The Unmoving Stones
The Great, Fully Dead