I take the Olympics and World Champs as more important than the NBA, and Gaze wins there. Sure, playing NBA year after year against the world's best athletes rates, but so do the games against the best in the world.
Oscar Schmidt WAS the best in the world outside the NBA for many years, and he would have been huge in the NBA if he'd wanted to go there, but he chose not to (from memory).
Patty is an excitement machine but he would never have had 100 NBL games of 40+ points against some very strong imports and locals, Luc wasn't just a bit player on the Bulls, and Delly deserves kudos for working his butt off.
However, in terms of world basketball, my GAOAT is LJ, followed by Bogut, Gaze, Mills, Luc and then possibly Sandy Brondello.