Interesting concept, he showed the birth of everything according to his idea (maybe? Or he just liked the concept) then showed the best of what has born form humanity according to his canons, so music, art, science... Portraits are well done, I don't really know who are the 2 you couldn't identify, I see a hand of the first as if he's thinking
All the musicians are from about same time, maybe the classic period was the best for him
If I have to make a pick, I would pick "waiting"