1984 is certainly the most top heavy given that it has Jordan and Hakeem, then a couple other HOFers in Stockton and Barkley. I wasn't a huge follower of the NBA as a whole back then, so I may be missing some valuable role players, but the only ones that stick out to me are Perkins, Thorpe, and Willis.
1996 had star power and depth. Kobe, Nash, Iverson, Camby, Marbury, Ray Allen, Antoine Walker, Peja, Jermaine O'Neal, and Ilgauskas were stars on some level for their teams. Dampier, Wright, Delk, Kittles, McCarty, Roy Rodgers, Othella Harrington, Jeff McGinnis, Jerome Williams, Derek Fisher, Malik Rose, Shandon Anderson, and probably a few more guys were good role players.
I mean the 1996 class is probably the deepest class of all time by a huge margin.
2003 doesn't match up to 84 in star power most likely, and it's dicey whether it will even match up to 96 in star power. It definitely doesn't match up to 96 in depth. It's still the best draft class in a long time though.
I'd order them as 96, 84, 2003 most likely. I also think 2000 is the worst draft class by a million. I mean nothing is even close to the wretched trash that was in the 2000 draft class. The best players out of it are Michael Redd and Kenyon Martin who both had a couple good years, got max contracts and then have been albatrosses on their teams.