Maybe Heiskanen? McAvoy? Or an aging Josi or Hedman? Even Karlsson. We may have to add but it’s at least something to consider.
Okay, so now there's somewhere to start.
Heiskanen. After him there largest minute eater is a 38 year Suter. Then it's Haakanpa and Lindell. Quite a drop in quality there leading to them needing to find another number 1. For forward they already have very productive young players in Robertson and Hintz. So losing Heiskanen is more detrimental than the benefit gained by having Draisaitl. Also, they'd be giving up 6+ years of Heiskenan for 2+ years of Draisaitl. Dallas laughs at the offer.
McAvoy. Fortunately they do have one other quality dman under thirty in Lindholm, but again the drop from McAvoy to any of there 3/4/5 d-men is massive. They'd be giving up 7+ years of McAvoy for 2+ years of Draisaitl. However, their forwards are a bit older, so maybe they'd consider it a year from now if they thought they could extend him, but they don't really need him this year with 8 forwards already over 10 goals on the year. Edmonton would need to add significantly in this trade.
Josi - Again giving up 5+ years for 2+ years, though maybe the fact he's 37 when the contract runs out they consider it as they might be staring at a rebuild. But if they rebuild, would they be able to extend Draisaitl? They do have some other decent vet dmen, so maybe, but I'm not sure the gains we'd have on Defesne would outweigh the loss on offense.
Hedman - He's a lightning for life. management has locked up that entire core until close to retirement they won't shake that up.
Karlsson - Simply no. They literally couldn't give him away 6 months ago, now your giving them Draisaitl for him. No Thanks.