Since 1950, there have been 110 seasons in which a player has put up over 15 Win Shares.
Of those 110 seasons, 75 of them are from the top 13 guys (68.2%)
66 of them are from the top 10 guys (60%)
49 are from the top 6 guys (44.5%).
So, of the truly great seasons in NBA history, these 13 guys have put up a huge majority, and the top 6 guys have put up almost half.
13 (tie) Barkley, Garnett, Durant - 3 each
10 (tie) Bird, Magic, Dirk - 4 each
7. David Robinson - 5
6 (tie) Oscar and Kareem - 6 each
4. LeBron 7 times.
3. Karl Malone 9 times
2. Jordan 10 times
1. Wilt 11 times.
Move over to the Playoffs - there have been 109 playoff seasons where someone has put up 3 or more WS.
50 seasons ome from the top 10 guys (45%):
10. West Duncan Kobe Bird - 4X
6. Shaq LeBron Wilt Kareem - 5X
2. Magic 6X
1. Jordan 8X
Total NBA great on one of the two lists - 17 guys.
If you want to find guys who had a top 10 career in the regular season and in the playoffs, you would throw out 11 guys not on both lists (Barkley, KG, Durant, Dirk, David, Oscar, Malone all don't have enough playoff cred; West, Kobe, Shaq, Duncan all don't have regular season cred'), so you end up with these 6 guys:
Bird, Magic, Kareem, Wilt, LeBron, Jordan.
Add up the great regular seasons and the great playoff seasons and you get:
6th Place. Bird (4+4 =) 8
5th. Magic (4+6=) 10
4th. Kareem (6+5=) 11
3rd. LeBron (7+5=) 12
2nd. Wilt (11+5=) 16
1st. Jordan (10+8=) 18.