https://stats.nba.com/players/clutch-traditional/?dir=-1&sort=GP
Accourding to nba.com.
Kemba score more points in the clutch than kyrie and is 7th behind chriss, lemon, olapipo, leonard, harden, sumner
Who is Chriss, Lemon?
Haha - I mean, come on silky - you have to remove Walt Lemon, Marquese Chriss, Tony Bradley, and Jerome Robinson from the list as the sample size is WAY too small.
That leaves you with: Kawhi, Oladipo, Irving, Booker, and then Walker (in that order). So he is 5th on this list, but some pretty well-known guys are missing. I would easily say top 10, so 5th-7th isn't out of the ballpark by any means. The stats page shows those players all so close so I would use that more as a guideline than absolute fact.