One has to look at win percentage IMO and my rankings are (in reverse order for worst i.e. Bluey,
Sk, Cappy, Elliott):
Elliott had 45% at the Warriors, 45% Raiders 43% at Penrith plus 69% at Bradford
Cappy had 45% at the Warriors
SK has 43% at the Warriors and 24% at the Eels plus Kiwis 55%
Bluey had 36% at the Warriors but 72% at Leeds plus Kiwis 36%
Some explanation behind those rankings:
Elliott had to deal with Watson and Owen Glenn, and had actually been asked by Glenn to develop a managers role with Cappy as coach, then he got sacked. He certainly wasn't a players favourite but.
Cappy and Bluey were terribly under resourced by Watson. Bluey should have demanded more resources before coming back, but then they might have stuck with Ivan, and he obviously wanted to come home.
SK was a better Kiwis coach, but Bluey didn't have Wayne Bennett helping...did he? Also
SK is the best resourced Warriors coach of all time.
Conclusion...this club couldn't pick a decent management team if it tried. They had Ivan and Hart and really blew that. Elliott and Cappy might have worked well too, if they had been resourced.
To me, the figures suggest that neither
SK or Bluey is an NRL coach, end of story.
When Graham Lowe said the club has to stop being nice to people and think about winning a comp, my guess is he means
SK.