It depends on the goalie. Fleury isn't a bad pick first overall even in hindsight. He had a 20 year career as a starter, and while he was never a world beater, many of his contemporaries in the 2003 draft had 6-7 good years and fell off completely like Staal, Richards, Vanek, etc. He probably still goes top ten after Bergeron, Weber, Burns, Pavelski, Getzlaf, Perry and Suter.
Luongo same thing. Price same thing, I don't see an argument for anyone except Crosby or Kopitar. You don't get these elite HOF goalies just anywhere. You can still get good ones outside the first, but if you've got a sure thing like Price, why take the chance when Gilbert Brule is the next BPA?