I looked at some of the top performers based off a tweet and by kills Zmjjkk might have had one of the best runs oat.

Zmjjkk played 13 games ( the least of anyone I looked at), 281 rounds , 394 kills which is 30.307 kpg ( highest of anyone I looked at), and 1.402 kpr

To contrast here are some other notable ones and I put an asterisk to who had the most notable of each stat.

Yay in 2022, 17 games, 354 rounds, 460* kills, 27.05 kpg, 1.260 kpr

Aspas in 2023, 16 games, 273 rounds ( least amount of rounds), 446 kills, 27.875 kpg, 1.633 kpr*

Demon1 in 2023, 17 games, 367 rounds, 421 kills, 24.765 kpg, 1.147 kpr

Reins in 2024, 19 games, 405 rounds, 419 kills, 22.052 kpg, 1.034 kpr

So in my opinion, Aspas in 2023 or Yay probably had the goat champs performance. Demon1 in my opinion has the most overrated run and is solidly behind kangkang. Reins I included for fun just to see how he would do ( he did awfully compared to them). I didn't include the teammates of anyone on the same run but rather just who had the most kills between the two I.E Less in 2022 or MiniBoo in 2024 ( he would just have stats worse than Reins). KangKang obviously has an argument for the best run with most kills in the least amounts of games. These types of things don't account for things like setting up teammates but its still fun to look at.