Too much uncertainty with Demko between his very poor level of play and injuries this season.
Maybe he'll be back being a superstar next season but given that he's turning 28 in December I'd steer clear paying 100 cents on the dollar for Demko.
Swayman would be perfect but may not be available.
Ullmark is a more getable option and would likely be an improvement on Vanecek.
Markström is genuinely bad at the NHL level.
Three good seasons in a 10 year career and some unearned Vezina votes last year doesn't make for a good target for a budding contender.
Factoring in his age and NMC the Devils should steer far clear of this guy.
I don't see Vladar an improvement on Vanecek, doubtful if he'd be better than Blackwood even (lateral move at the very best).
Cannot see any way Wolf would be made available, he'll be crucial for the Flames going forward given that he's got the makings of a NHL starter and on an ELC for next season.
Gustavsson is very interesting but I just don't see how the Wild would make him available.
You should be able to extend him at an AAV below Fleury's 3.5m AAV, and given that Wallstedt looks more than ready for the NHL Fleury will likely be the one to move (if they can get him to waive his NMC).
Dostal is interesting but I don't think the Ducks would make him available.
Gibson shouldn't be a target at all however, given that he's been quite bad at the NHL level through the majority of the last 4-5 seasons. He's nowhere near worth his 6m cap hit.
From the guys you listed here I think that Ullmark would make the most sense when accounting for talent, cap hit, availability and price.
Quoting: MisstheWhalers
Nemec for Hellebuyck?
No way.
Quoting: NHLfan10506
$5.75m x 6 years is a hometown discount.
He is likely to be the most sought after UFA this summer, and shouldn’t have any problem getting low-to-mid 6s on long term deal.
I'm not sure how GMs will react to him getting less ice-time and scoring less compared to last year though.
We might know that Severson has played just as well (if not better) than last seasons but other GMs might not.
Therefore I don't think it'd be out of the question to get Severson at a 5m AAV, especially if he's offered the full 8 years and minor trade protections.
That'd be a great outcome if Marino was traded for an improvement elsewhere on the roster.