Chandler makes sense, and of course, we all expect him to go.
I floated the idea of Bailey leaving months ago, so that one wouldn't surprise me. His lack of participation during Senior Day activities clouds that just a little, but I still think he likely leaves.
The other two would be really surprising.
JJJ really has nowhere to go unless he's just unhappy at Tennessee, which doesn't seem to be the case, at all, or he wants to go overseas. The NBA probably likes his game, but not enough to be drafted in the 1st round, and maybe not at all, yet. He cannot finish at the rim despite being 6-6 and built like a Roman gladiator. That needs to be his next, and last developmental skill at the collegiate level.
Diboundje has a lot of upside, untapped potential. They limited his minutes throughout the season in hopes of preserving his eligibility for a "redshirt" under the presumed new rules for a reason, I believe. If be surprised to see him bolt so quickly to take a significant step down, and I'd be surprised to see Schwartz actively pursue him unless he had already made up his mind that he was leaving.