#1 Not going to retire soon: Triple H
Triple H suffered various injuries throughout his wrestling career but despite this, he continued working for WWE. He is almost 50 years old but could still provide a decent match, which is one of the reasons why he may not retire anytime soon.
The Game is also the mastermind behind NXT and despite his hefty schedule, he manages to wrestle occasionally. In the past few years, Triple H has put over many younger talents and it wouldn't be shocking if he continues doing that, for the next few years.
He has already defended his career in multiple 'Mania matches but has always come on top. NXT Superstars are the future of WWE and Triple H would definitely want to create his own Superstars in WWE, but to do that he has to continue wrestling. When the time will come, The Game would retire and continue doing backstage work.