there isn't one guy on your list that wouldn't cost you an arm and a leg. none of those guys are an option if you want to keep your core... get real man you want guys like eichel for nothing?

Indeed, only Marchessault could be had without having to trade back at least 1 significant core player, so I guess he's the answer? He,s a good player and maybe a late bloomer like Martin St Louis but is also small and doesn't have a long track record at the NHL level yet.

the only option i see if you don't want to give important player on the roster it's one offer sheet , on Draisaitl for example . it cost 4x first round pick but no player on the roster or lower your expectation and look for a second centre and not a first than you can pay something like Juulson and a first round maybe i little more depending on the target and not touch your roster again . but the player on your list you will have to give at least one player on the roster + prospect or draft pick . if you want to know what you can receive we have to know what you want to give .if you don't include one of them in the trade : Price, Weber ,Galchenyuk ,Pacioretty, Drouin ,Lehkonen,Gallagher , Danault , Byron (those are the one with the highest value in my opinion ) it will be hard to make a faire trade