I'm not a game player so I don't know how helpful this will be but here goes:
In the absence of Robert Williams, the starters may be J+J, Smart, Horford and Grant W. Leaving a bench of
Malcolm Brogdon, who is a highly regarded, oft-injured guard
Derrick White, who seems to be a good player even though the box score doesn't always show it
Luke Kornet, a fairly decent backup center who is recovering from a minor injury.
Sam Hauser - an excellent shooter and a so-so defender who will get minutes for the first time this year. He'll be pretty good in a limited role.
Payton Prichard, who seems destined to be riding the pine because of the addition of Brogdon. I expect him to be traded mid-year.
Blake Griffin - not much left in the tank
HIgh energy deep bench guys -
Mfiondu Kabengele - a strong center who seems to have something to prove
Noah Vonleh - decent deep bench forward
JD Davison - a rookie point guard drafted in the second round this year who has flashed some talent
Brodric Thomas - I don't think he'll add much
Probably won't make the roster
Jake Layman
Luka Samanic
Coming back from surgery in a month or two- Robert Williams
Probably not coming back from surgery during the season but might be available in the playoffs - Danillo Gallinari