[MGB]

Thanks guys...super helpful as usual!

Sean - it looks like 38 is a B-wing helmet belonging to the Revenge of the Jedi figure Keyan Farlander...thanks for putting me on the right road!

A few others identified:

8 - Supernaturals Lionheart
21 - TMNT Fightin Gear Leo
1, 10, 20, 30 - Imaginext for the early 2000s (smaller heads)