Sure, here is Zaitsev:
Zaitsev is not well liked by Evolving-Wild's WAR model and as such his overall value is almost as poor as Lucic's. That being said, given what is being reported by the media, it seems as though GMs don't feel the same way about Zaitsev and believe he can still be a valuable contributer. As such, I don't believe a Zaitsev trade would fall under the typical salary dump trade; however, if GMs were to value him similarly to the WAR model used the package to move him would be costly.
Zaitsev has been a below replacement level defender and is signed for 5 more years at a 4.5M salary, that is about as poor a contract as you can have. The mid range cost to move him is Sandin, assuming after the great 2018 season he had is now worth a pick in the 5-10 range and a 2020 1st, assuming it falls in the 16-31 range. Other alternatives would be to include one of Kapanen or Johsson in the trade, though Johnsson would require a 2nd round pick to be included to have the overall value end up in the mid range area. Of course the Leafs could also package their other assets such as Liljegren, Bracco, Korshkov, and future picks depending on how other teams value Zaitsev.
This is an example of a trade around the lower end of the cost range:
Here is David Backes:
He's interesting because his value really depends on whether or not he's capable of playing anymore. As it currently stands the mid range cost to move him is just a 2nd+7th. His TOI in the playoffs was typically sub 10 minutes so I think you'd have a hard time convincing teams that he can still be a valuable contributor. I think given his injury history the trade would be a higher than what's projected at the mid range; I would expect something along the lines of a 2nd+3rd, or potentially even a 1st+ if the Bruins were to try and dump Backes.
One last thing to keep in mind is that I'm not sure NHL teams value later round picks the same way this framework does. I could quite easily see a late 3rd to a 7th round pick being interchangeable to some GMs if they are getting high picks (1sts or 2nds) or good young players in return.