If anyone's still working on divining who's who, I did a little note-taking.
Player 1
*seems to have played here multiple seasons, "some sucky, some fun"
*seems to have played multiple other places before Columbus
*was glad for the lack of notoriety
*mentioned the old plane but that the travel sitch is improved and rest of off-ice amenities have kept up with rest of league
*used 'they' when talking about the 2019 team winning a playoff round
*perceived negatives about Jarmo and Torts were not really a big deal, although he would fire Torts not because he's a bad coach or a bad person but because it's time
Player 2
*used 'young guys' a lot to describe players not like himself it seemed
*talked contract, would have loved to have stayed but felt was lowballed in contract talks, said team expected a discount - seemed to suggest that was an attitude that could turn off younger players/RFAs as well
*no marketing - liked city but there is a perception problem, 'uphill battle'
*wife and he liked going to German Village - seemed to suggest that you have to learn how cool the city is
*mentioned Torts would call out Bob, Panarin, Cam, Sedlak so there are some teammates for you
Player 3
*things like 'last season' and 'exit meetings' suggests a player who was here for multiple seasons and who finished the season here
*played here with other teams before maybe, referenced cannon and crowds
*a player who would have liked to have stayed, and would have signed for less than what could get elsewhere, but was given the feeling that the team was moving on from him, in favor of younger guys
*said Jarmo seems to always have eyes on future, perhaps to detriment of present
*speak of young players as 'that generation'
*said guys need to feel a part of something
Does any of that help?
Player 2 has to have been either Ian Cole, Matt Duchene, or Vanek, with my guess is it being one of the first two. Literally don't think it could be anyone else. Married. Player had to have been here in at least one of 2017-18 or 2018-19 (or both) due to the Panarin reference. He was a guy who left UFA over money/generated a lot of interest on the market ("Well, that's where we're at and there are like six other teams willing to go there."; that would seem to eliminate someone like Vanek, although he did sign with Detroit for $3 million, so I could maybe see the CBJ throwing out wanting him to sign for something like $1.5 and there being a plethora of teams willing to go into that $2.5-3 range). Unfortunately, there was nothing really stated that could differentiate whether it was Cole or Duchene, unless you think Duchene was always set on Nashville, which would lean toward it being Cole.
Theoretically, Player 2 could be Dzingel, although he wasn't married at the time (although maybe he said "wife" referring to his at-the-time girlfriend). He also I think could be considered as having a bit of an "axe to grind" with the organization; his time here cost him a lot of money, which I think was mostly his fault, but maybe he'd blame Torts. Both of those make me think it's extremely, extremely unlikely it's him.
I kinda think Player 1 is Hartnell. Would have had to have been a player who was there in 2015-16 and probably pre-Torts in 2014-15, too (reference to some sucky seasons - plural. He did say fun seasons, also plural, which is my only hesitancy toward him since he was only here for one 'good' season, but theoretically, even the bad seasons could've been 'fun') and gone by the 2018-19 season. Also, the way he answered the questions in the article, not just what he said but how he said it totally comes across as Hartnell to me. But definitely not 'sure' about it.
Would need to think more about Player 3, could be a decent number of guys. I'd feel more confident that it was Letestu if it wasn't for his signing with the organization in 2018-19; if he had gone somewhere else after the 2017-18 season, I'd be more likely to think it was him.