A little early to speculate on that... But it's gotta be an offensive superstar... like a Center.
If Yzerman keeps his Cap in line, and builds a team of big, fast, tough defensive players that can create some offense (both forwards and D'men); which is what you are saying and also it looks like that is EXACTLY what he's doing... adding that 1 dominant offensive player might just be the trick.
Yeah, like this.
No... NOT this.
THIS!!!: