Easy one, Joel Eriksson Ek. How this guy has never been a finalist for the Selke, I do not know. He battles for literally every inch of ice, all over the ice, and usually wins. He's got a good stick, good positioning, strong body, he's physical, and he even scores most of his goals for the same reasons that he's good defensively, he's just right there and can't be moved.
There are three things I will never stop singing the virtues of: my family, Costco, and Joel Eriksson Ek. I know about it, and you need to know it too.
Behind him there's a cast of decent defensive guys, but none that are as complete. Guys who deserve a little credit are Ryan Hartman, Marcus Foligno, and (until last year) Freddy Gaudreau. I think Marco Rossi is going to get there, too, but he wasn't there yet.