Joel Eriksson Ek, Luke Kunin, Nino Niederreiter, 2018 1st round pick, maybe Coyle, maybe Spurgeon. It would be a shame to trade Koivu. But I think you could move other guys and be ok. Contracts and other considerations make the realistic no-trade list much longer. These are desperate times for the GM, but this team can weather the storm and we're only at the quarter mark. I wouldn't really be upset if the rights to Kahkonen, Greenway, or Kaprizov moved either if none of those guys has a future in St. Paul.
It would be nice to get an inexpensive player who hasn't yet found a role for his organization: a player from the Nic Petan, Sonny Milano, Oliver Bjorkstrand tree. Michael Dal Colle or Ryan Pulock? Someone like Jake Virtanen? Maybe Buffalo deals us Hudson Fasching in exchange for someone better.
The Wild need some youth, they need some cap flexibility. Dumba should return a player with similar pedigree and upside if the decision is to cut bait. Brodin wouldn't get you a Taylor Hall but a lesser version would still help. After all, we don't know that the GM can afford Jason Zucker next season - he's playing himself into Nino's contract range.