I wonder if Kevin Love could come with a LeBron opt-in-and-trade if that would be enticing enough to LeBron.
First off, we'd have to find an agreement with other teams before July 1st on a hypothetical trade like this:
POR Gets: LeBron, Love, Plumlee (TPE)
CLE Gets: Harkless, Leonard, 2019, 2021, & 2023 POR 1sts
ATL Gets: Turner, Swanigan, #24 draftee?
TOR/LAC/DAL Gets: Aminu (TPE or cap space)
Assuming Cleveland wants to shed some salary, and they're likely to lose LeBron for nothing, this essentially works out to be Harkless, Leonard, and 3 future firsts for Love.
Atlanta takes on some salary, but adds Swanigan and whoever we take with #24. Since this trade happens after July 1st, we can trade whoever we picked (if they haven't been signed) and still trade our 2019 1st. Atlanta likely does it due to how much cap space they have, and Evan Turner is only making slightly more than Plumlee over the same span.
Finally, Aminu goes to a team that has a TPE or cap space that would want him. If that team has salary they don't want, we could take back up to $3.5M using the Vonleh TPE.
So we'd have this after we resign Nurkic and maybe Davis:
Lillard / Baldwin
McCollum / ?
LeBron / ?
Love / Collins
Nurkic / Davis
We could fill out the bench with our tax-payer MLE and a minimum contract player.
I think that'd have to be enticing to LeBron. That lineup is legit. This about what he had in Cleveland and add Lillard, McCollum, and Nurkic to it. I think that team is just as good as a Houston team with CP3 and Harden (they'd have to get rid of Capela, Anderson, Gordon, and Tucker to make that work).