For me, international should be one that hasn't played in high school and/or college in the US, has played in a pro league abroad and most important, plays for a national team other than USA Basketball. The NBA may consider birthplace to label a player as "international", but that's a marketing strategy. I just can't consider Tim Duncan or Hakeem Olajuwon "international" when they've represented USA Basketball in the Olympics and World Championships.
If we are counting NBA achievements only, then no, but he is in the top 5. If individual and team trophies achieved elsewhere are taken into the mix, he's a top 3 without a doubt. The same applies for Sabonis, if you take his overseas career, he is a lock for the first or second place.
Dirk and Nash are the opposite, their NBA careers help their cause, but their international resume doesn't add much.
However, many of these players are still active, so at least a couple of years would be needed to measure their careers.
My top 10, right now:
1- Sabonis
2- Manu
3- Dirk
4- Nash
5- Petrovic
6- Kukoc
7- Mutombo
8- Tony Parker
9- Dino Radja
10- Rik Smits/ Vlade Divac
But that's a list made on the run and I'm probably forgetting a couple of names.