J: Jeeves

Jeeves.
The suave, gentleman's gentleman, the Inimitable Jeeves.
Wodehouse's primary character about whom several books revolve is Bertie Wooster, whose comical misadventures would reach a uncharacteristically sad endings if it were not for his butler Jeeves.
In this case, the phrase 'the butler did it' takes on a different meaning.
The decorous man is always pulling out of thick soup, not only Bertie but also the menagerie of slightly ludicrous friends. Along with that in his inimitable way,  he also manages to make sure that Bertie doesn't go trotting about in rather fruity brightish scarlet cummebunds, which when he draped round the old tum, had caused Jeeves to have shied like a startled mustang. Besides all this, which is obviously more than a full time job, Jeeves also manages to keep Bertie's language complete.
“I shall begin by saying that Miss Cook, to whom I’m engaged, is a lady for whom I have the utmost esteem and respect, but on certain matters we do not…what’s the expression?’
‘See eye-to-eye sir?’
‘That’s right. And unfortunately those matters are the what’d-you-call-it of my whole policy.What is it that policies have?’
‘I think the word for which you are groping, sir, may possibly be cornerstone.’ 

Flawless.