I'll rather say Napoli Juventus and Inter Milan, Napoli is my first option cause they won the title and look ready to do it again since the brain behind the trophy Conte is still in the team he wasn't reshuffled to Juventus or Inter. I'm not still convinced about Inter though since i don't trust that their new coach is equal to the task but since they still have most of their players intact I think they'll do well if the coach can manage them properly.
I would also still favor Napoli. Inter are likely to compete, but as you say, the new coach must manage the available players well. If all goes well, maybe Inter can appear stable in the competition with Napoli.
For other teams, I hope Milan can show improvement, as well as Juventus and Atalanta, who hopefully can perform better in the competition of the new season.
Teams like Fiorentina and Lazio also used to perform well at the beginning of the season. But eventually they lost focus and were no longer consistent in the middle of the season.
Napoli has long since emerged from their difficult period, but they're still the favorites heading into next season. Inter, with their coaching change, could show a dramatic turnaround or even do better than last season.
I hope Juventus, on the other hand, will wake up, as they seem like a mere ornament to me.