I'd love for Murray to win a slam and he will. I'm positive about it, i have no doubt. But he will never achieve the status of the other 3.
So what? For him winning one slam is enough to be an icon. He will be knighted and never be forgotten in British tennis - that's all he needs, one slam.
And to be honest things turned around for Novak - they could for Murray too. It's not inconceivable that he could win US Open 12 and 13 and Aus Open 13. Suddenly he's on 3 slams, has lots of Masters, has great matches against 3 all time greats and will be a player who's among the very best himself.
As for status - Djokovic doesn't have the status of Federer and Murray doesn't have the status of Djokovic - they're all ranked differently in a historical sense. But things can change and the gap can narrow. They have time yet - I'm sure Murray will win one at some point. He needs that extra little bit of luck he hasn't had so far...