Well, according to General Fanager, there's like 7 teams with 7M or more in capspace, and another three with 6M+.
Of those 10 teams, four have important unsigned RFA's of their own (Anaheim, Winnipeg, Calgary and Buffao)
Another one is the Edmonton Oilers, who will have some serious cap crunch at some point (and who'll have to give Draisaitl a significant raise for next season). Another is Ottawa, who are probably already over budget.
Four teams are left : Hurricanes (possibly already over budget, might have a high pick in 2017), Devils (ditto), Panthers (seems like a candidate, budget?), Predators (ditto, and only 6M capspace).