Richard Brodeur also brought the Canucks to the Finals; doesn't mean he was a Hall of Famer.
I dunno, Luongo is maybe closer than most, but I don't think he cuts it. I think a goalie gets judged on:
a) regular seasons success (wins vs. losses)
b) hardware / League-leader
c) championship success (Gold medals, Stanley Cup, etc.)
d) intangible of being the guy the media/coaches/GMs talk about as the guy you trust in net in OT of game 7, etc.
In my mind, Luongo scores:
a) pretty good
b) no (did lead the NHL in wins one year)
c) pretty good, but not great (Gold medal=yes; two trips to Stanley Cup finals but no Cup, including epic choke - albeit not his fault - in 2011 = not really)
d) not at all
Since he doesn't knock the ball out of the park on any one of these categories (to mix sports metaphors), I don't think he's getting in.
Having said that, it's becoming increasingly difficult to tell who is a great goalie and who isn't anymore. They're all kind of even at the 'starter' level now. For example: two years ago, Devan Dubnyk was a bum who was headed to the minors; this year he had the 2nd-best GAA and was NHL star of the month three months ago.