There are indeed many excellent practitioners in the NBA head coach industry. But when it comes to the top five current NBA coaches with the highest regular-season win percentage, I have a somewhat different opinion.
First of all, I think the number one is Coach Brown of the 76ers. He led the team to a winning rate of more than 70 percent, which is very rare in the entire history of the NBA. Of course, this is also related to the strength of the 76ers' roster over the years, but Coach Brown's tactical layout and personnel deployment are also very successful.
As for the second place, I think it should be the Bucks' coach Budenholzer. He led the Bucks to a winning streak and the team's defense was the best in the entire NBA. However, his coaching style is different from that of Coach Brown, who pays more attention to detail and execution.
As for Popovich, he's a really great coach, but I think he's in third place. After all, his team didn't have that much of a win percentage in the regular season. Of course, this does not affect his dominance in the playoffs, after all, the playoffs are the stage to test the true level of a coach.
As for Coach Kerr, his coaching style is somewhat similar to Popovich's, focusing on teams and defense. However, I don't think his coaching level is as high as Popovich's, so he is in fourth place.
The last one, I think, should be the Raptors' Nurse coach. Although his coaching style is different from his predecessors, his on-the-spot command and personnel deployment ability is also very strong. The Raptors have always had a very good record in the regular season, which is also related to Coach Nas's coaching ability.
That's my opinion on the top five active NBA coaches with the highest percentage of regular season wins, but of course, this is just my personal opinion, and the specific ranking depends on the performance and statistics of the whole season.