I side with the sentiment about the Joe's rafters being something really special. So yes, guys like Nick are a no brainer. I don't think anyone else per se is a complete "lock" to have his number retired other than him.
As for Ozzie, I think his numbers and play throughout the many many years speak for themselves. He HAS to be considered for the Hall, simply for his stats and longevity, no? That's just my opinion. But Ozzie in the rafters, I'll say this. I wouldn't mind it. I really could see it going either way. He's been a staple in the team for so long. But he's never been considered an "elite" goaltender for whatever reason. But he's always shut those critics up.
It goes back an forth and unfortunately, for whatever reason, I don't see either happening, as deserving as he is.