If only talking the Washington Nationals current iteration, I am going Rendon - Scherzer - Strasburg - Zimmerman.
Zimmerman, Scherzer, Strasburg are easy. Then it is hard.
I wanted to say Bryce Harper, but he didn't win a championship. So, it obviously is Juan Soto, right? His fWAR for Nats is less than Turner.
It has to be Rendon. Second all time in fWAR for Nats hitters behind Ryan Zimmerman. Champion. I'm not convinced the Nats even pull out of their depths in 2019 without Rendon raking.
Go look at Anthony Rendon stats as a Nat. You definitely remember he is good, you don't remember how really good he was. And the fact he's become at times irritating off the field doesn't change the fact he is really darn good.