I really think that every team can get any player they want, if they are willing to go far enough.
I mean -- I'm under no illusion that the B's are a front runner in this, but Rantanen is in the top 5% of forwards in the league, still shy of 30 and the kind of guy you can build around.
What I truly know nothing about is how interested he would be in signing here long term, which is really the crux of the situation. If they were given the chance to check in with him to see if he'd sign here and was willing --- then I'd be willing to send a package around Zacha and Carlo, which would at least allow them to ice a legitimate lineup in the wide open east.
Beyond that we have no idea what others would give up, but you have to assume that there would only be about 7-9 teams that;
A. He'd want to play for long term
B. Are willing to give up enough to get him
C. Have the cap space to pay him
Remember Carolina, is in bad position and almost has to allow teams to speak with him to gauge interest, or they are at risk of greatly minimizing the return he could get.