He would not have stayed if they weren't paying him well and massaging his ego too.
I suggest that the greatest SERVANTS of the club are all probably from the bygone eras. When it really was more about the football than the money.
Alternative candidates that come immediately to mind are: Bob Paisley, Joe Fagan, Ronnie Moran, Roy Evans, Ian Callaghan. All humble, committed and for whom the team and the club ALWAYS seemed to come above personal ambition. Faz, Stan and their fellow pensioners (

) could probably add to this list.
And then there are probably many others behind the scenes that most of us will never know about, people who are probably on the lowest of wages but who nonetheless gave great service to the club.