Then it would seem that Johnny Cash and John Ritter round out the trio led off by Warren Zevon.
I don’t think Johnny Cash’s passing is all that much of a suprise; he’d been in ill-health for a while, and he seemed like the sort of person who was unlikely to outlast June anyway. Still, knowing it’s coming just gives you time to be prepared–it doesn’t lessen the loss any.
Unfortunately, John Ritter really only serves as a source for jokes about, “Three’s Company”.