Here are the top 100 arranged by kills per root game.

KPRG Player
14.55 Drucifer85
11.43 slyner
11.30 4.
11.19 Noobie
10.75 michele
10.71 Shmilyhkg
10.56 cadpilot
10.51 diceptr
10.45 toms
9.89 gogi
9.75 kkbomb
9.71 Hobyandy
9.53 MWixxx
9.21 kikidice
8.96 Im Defeated
8.96 Spliffn
8.81 Juhokki
8.65 Deovolt001
8.61 greeen
8.28 rabbidmonkey4
8.21 papito1900
8.12 stakaboo
8.08 Brennwert
7.87 BenJa LeZana
7.74 Zard0z
7.63 ChalkdustTorture
7.46 jf220
7.45 Egazas
7.41 prairiehobo
7.21 Help, I'm a rock
7.18 @ahnbohwan
7.16 hcdug
7.14 panzer
7.10 Nerd Alert
6.72 integraI
6.51 bigbarbe
6.33 Monsanto
6.27 Mr.Mosgood
6.22 pdtkdt
6.17 2devi
6.16 Rastaa Man :)
6.05 rocka09
6.04 Maze78
6.00 shadolin
5.96 negramarta
5.95 Mattii
5.86 TimeR_rW
5.84 Khalid
5.79 vicsf
5.68 OneShot7
5.50 ffbsensei
5.32 Dziki
5.28 Qaziyev
5.22 prodoc
5.16 Ing.a
5.11 skuzzy
4.99 alex_sfb
4.98 WarPig11
4.93 SmokingJoker
4.73 Bollerus
4.72 bivo
4.71 michl
4.60 wishbone
4.55 parsifal
4.45 HiLLi26
4.43 longpube
4.26 @asd_asdfg123
4.22 Exa
4.18 ChiefWeeze
4.01 WhitebeardP
3.88 jurgen
3.86 Marcysch
3.86 Bullislander05
3.85 vino_en_carton
3.55 fish28
3.50 Fatman_x
3.33 Soromon
3.32 hisandherpes
3.30 GreyHunter4
3.11 Mitsi the cat
3.07 Loobee
3.03 Who'sNutz?
3.01 hippymelon
2.96 Rsquared
2.96 caesar-blue
2.74 potato27
2.65 OverNow
2.49 charliedontsurf
2.48 PRESIDENT N° 1
2.29 moulue
2.26 DurtyByrd
2.25 SHO-GUN
1.82 Gurgi
1.81 masterDD
1.77 6v1 lose
1.62 Sturmhardt
1.43 franklyghost
1.29 Fonias
0.76 elvissey
0.00 special k dice