No other player has had as great an impact on his team's success as Westbrook.
I'd amend that to "impact on his team's success *or failure.*"
Of course, that's pretty much the same as saying: Westbrook's usage rate is historically off the charts. If you're just talking about impact on team
success, I think you could pretty easily argue that LeBron, Curry or CP3 have a more positive impact on their teams. Russ's teams not been anywhere near as dominant with him on the floor as the other teams, and his net impact (on the floor v. on the bench) is significantly less positive than that of the other guys as well. He's also not any more positively impactful relative to his top teammates than the other guys are.
2016-17 On-Off
Russ: +4.1 on court / +12.5 net (Oladipo +8.2, Roberson +7.6, Adams +7.5)
Steph: +16.3 on court / +17.0 net (Green +12.5, Thompson +7.4, Durant +6.2)
LeBron: +8.9 on court / +17.5 net (Love +9.1, Irving +6.4, Thompson +0.2)
CP3: +13.5 on court / +19.3 net (Jordan +14.5, Griffin +11.9, Redick +10.8)
I'd probably also add (more anecdotally) that the other three guys
make their teammates better than Russ does.