Forgot about Siakam. I'd say it depends on what you need. Siakam if you need a bit more scoring with 1-2 3's. Poeltl if you need rebounds and blocks. the rest of their stats so far have been pretty similar.
Papagiannis I think should be good for blocks the rest of this week.
Gotten a block 7 out of the last 8 games he's played, and the Kings play Utah, New Orleans, and Minnesota, 3 teams with high usage bigs.