"Here's Nick's slash line for his Nats career: .280/.408/.460, adding up to a robust .867 OPS. (That includes the 2004 season in Montreal.) Here's the list of guys who took at least 2,000 plate appearances for the Nats and had a higher OPS: Juan Soto and Bryce Harper. That's it. Yep, Johnson had a higher OPS as a National than Anthony Rendon (.859), Trea Turner (.842) and Ryan Zimmerman (.816)."
Wow, awesome stats! Then my vote goes to Nick. I remember seeing him playing a few games in 04, though he did miss most of that season due to injury.