These first four are from Night Owl:
NH9 -- Jon Sigurosson, Iceland
HHB12 -- Victor Lustig
HHB16 -- The Cottingley Fairies
And this one if from Fan of Reds:
HHB4 -- Idaho
These next few are just straight up purchases from Checkoutmycards.com. You can find these inserts at surprisingly cheap prices sometimes. These were all under 75 cents each.
NH1 -- George Washington, USA
NH20 -- Tadeusz Kosciuszko, Poland
NH26 -- Jose Rizal, Philippines
NH38 -- David Ben-Gurion, Israel
NH15 -- Tiradentes, Brazil
I look at these, especially the National Heroes cards, and it just is sad how bad some other sets look.