Per www.basketball-reference.com, the greatest site in the world, it currently takes the following stats to be Top 75 on the combined NBA/ABA lists:
Points -- 17,770
Rebounds - 8059
Assists -- 4612
The guys who have reached all of those levels?
Kareem, Wilt, Karl Malone, Kevin Garnett, Julius Erving (counting ABA stats), and Larry Bird
I looked -- Oscar is short a couple hundred rebounds and Magic is short like 10 points.
Top 50 in all categories:
Points -- 19,528
Rebounds - 9,443
Assists - 5,314
Those who meet all three criteria?
Kareem Abdul-Jabbar (1st in points, 4th in rebounds, 41st in assists).
Kevin Garnett (20th in points, 10th in rebounds, 47th in assists).
For those, like me, who loved KG as a player, this is a very impressive Group of Two for him to be in and it indicates that for longevity and versatility KG should maybe be moved higher on the all-time lists..
For those of you wondering -- Bird is short on rebounds to be Top 50. Wilt, Karl, Doc all are short on assists to be top 50.