They were three famous people who died recently, I liked all three and therefore all three of their deaths made me sad and I hope the "rule of three" superstition will hold true so no more famous people I like will die for a while. That's it. Who's better than who doesn't really come into it.
Now, obviously if you think Lemmy isn't important enough to count, then I guess you're still waiting for number three. Hope it's no one you like