You forgot Patrick, who also needs a new deal.
I think the more likely option is they move on from either Hagg or Gostisbehere. With Friedman signing a new deal, and Morin healthy as your #7, they only need one of the other two. Either is probably easier to move than JVR, who would probably require some salary coming back.
That said, I don't really know that they need to move anyone out. Myers is probably going to be the most expensive of the bunch, and I can't see him costing more than 2 million unless they go after a long term deal, which I would support. I imagine Patrick and the Flyers will go for a low cost short term deal. NAK will come in under 1 million. If they bring back Moose he should be low cost, and they have Ustimenko, Sandstrom, etc waiting in the wings. Sandin is probably going to have a strong shot at the team, and Frost and Farabee are other guys on ELCs that should probably make full time contributions.