Peters and Thomas are basically the only two players on the roster who I can see actually get a restructure, where they'd convert salary into bonus and get some cap savings.
The only other player who you could potentially do it on is Brandon Williams, though he only has one year left after this year, so you really wouldn't save that much, and you'd just be ballooning his cap hit in 2021 to a level where you may not be able to realistically move on from him either.
There's nobody else on the roster with a contract that I see that would really do anything in terms of a restructure. Anything else would likely require an extension, ala Sam Koch.
Ricard was also mentioned as a possibility to save $1.75M if I remember correctly. Not a huge strain on future cap but opens up a little bit.