Duncan top 10, Bird top 5.
Bird not only won 3 MVPs (should have won in 81 and 87 too) but he was top 2 from 80/81-86/87 (3 wins, 3 runner ups), 3rd in 87/88 and 4th in 79/80. So 9 years, no worse than top 4 with most of that in the top 2. Duncan can't claim that.
As for players being better now? Debatable. How many great shooters are there now? Ball handlers? How do past players fare with today's star calls, lack of hand checking, ability to carry the ball or run over people?
Oh and Russell, Jordan, Bird, Magic, Kareem, Wilt, Duncan 7.