Kareem is the GOAT. I guess Jordan can be "1a".
Actually I wouldn't even consider Jordan a "1a" to Kareem. Kareem would be a more valuable addition to over 90% of NBA teams than a Michael Jordan.
Back on topic. Jordan is much better than Wade at the same age and Magic Johnson is in a league of his own for non-big men for the under 25 years of age category.