We just did this a few months ago from Meyer as well. We had 13 rares and 2 GLWs. It's fun to try to guess breeds this early but it can be tough. At 13 weeks I'm just now feeling confident I know what all of ours are.
For what it's worth, our lavender orpingtons did look a lot like a few of yours. Worth noting that it's hard to tell the difference between a true lavender and light colored blues since Meyer has both. Our blue andalusian looked similar as a chick but was smaller and the difference in body shape became clearer as they grew.
We had 3 dark chipmunks like one in your group photo. Ended up with 2 barnevelders and a partridge rock.
Really tough to tell early on with the black ones. We had 2 who ended up being an olive egger and jersey giant. But Meyer also has minorcas, black orpingtons, etc.
Good luck with the beautiful chicks. With patience, this site, and the chick ID page on Meyer's site, you'll get them figured out. Keep us posted. I'm curious about the first and last individual photos.