The Canucks were the most interested team in Guentzel, but they didn't have a 1st or 2nd this year and weren't willing to trade Lekkerimaki for Guentzel. What did they have to offer? At best you were looking at something like Podkolzin (who was dumped for a 4th in the off-season), Raty and a 2025 1st, which isn't better than what the Penguins got.
There was a rumor that the Rangers offered Othmann for Guentzel, but without knowing what was on top of that, it's hard to say. Beyond that, there didn't seem to be a massive market for Guentzel.