I don't know if its true or not but one of the commentators said that the only player who has a better FT% than Dirk in the playoffs is Larry Bird.
Dirk is 12th and Bird 10th.
Ahead of them are -- Reggie Miller, Ray Allen, Peja Stojakovic, Steve Nash, Hersey Hawkins, Kiki Vandeweghe, Bill Sharman, Calvin Murphy and #1 Mark Price.
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Dirk and Bird have taken and made the most free throws of any players off of that list though. Both of around 900 made FTs.
They have more than double the number of made FTs than everyone else on that list except for Reggie Miller (770). And Chauncey Billups (776) who is 16th in FT% and is in third place for makes out of those high percentage FT shooters. Interesting.
I'd definitely consider Dirk and Bird the two best FT shooters in NBA history given their number of attempts and accuracy levels.
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I decided to run a different search. I looked for players with 400+ made free throws in the playoffs and a FT% of greater than 86%.
One other name popped up - Rip Hamilton - not a guy I expected to see on this list. 598 makes on 688 attempts. That is a lot of free throws for a guy who is fairly mediocre at getting to the line normally. I suppose the added minutes played per game in the playoffs titled things. Still, nice achievement from Rip.
If I lower it again to 85%, Oscar Robertson (560) and Joe Dumars (406 made FTs) are added to the list.