@sunrise: it's not that many. I counted them for you:
520 BC: Alexander Graham Bell (GE) - built great library
200 BC: Darwin (GS) - lightbulbed philosophy
40 AD: Copernicus (GS) - academy
380 AD: Rosalind Franklin (GS) - settled
620 AD: Descartes (GS) - settled
740 AD: J-M Jacquard (GE) - built Taj Mahal
840 AD: Kepler (GS) - lightbulbed printing press
1100 AD: Rockafeller (GM) - golden age
1200 AD: Ben Franklin (GE) - unused
1240 AD: Lavoisier (GS) - unused
I think I'm going to use Ben Franklin to build the National Park in a city that I'm planning to found in the northwest, here:
It can get 9 forest preserves. I can start building the preserves after SciMeth, and then I can build the park after biology (my next tech). This is a city that is the unusual situation that a library may be a better first build than a granary.
Lavoisier I'm going to settle in Thebes.