I think we maybe don't need to look for a 1C right now. The plan is for Zibanejad to keep progressing. The team is retooling and, frankly, I don't think a retooling team can afford to hedge against young players NOT taking the next step.
Zibanejad 1C. Buchnevich every day top 6. Perhaps Miller takes one more step. Perhaps Hayes takes one more step. Vesey too.
The reason the team "overachieved" last year is because players progressed. Again, when the team is retooling, that's what you're looking for.
So, what I think they should be in the market for is a middle 6 C, but preferably a 2C level player. Anisimov is a somewhat interesting trade target. Paul Stastny? RNH? The problem with both of those guys is that neither fits the speed speed speed thing we want.