Leyrann
Deity
Heck, given an oppressive enough government system, even your own Great People will take off: witness the mass exodus of Great Scientists from Nazi Germany in the 1930s.
And, conversely, a sufficiently tolerant government will draw Great People from surrounding countries. The Netherlands had a lot of great thinkers from all across Europe in the 17th and 18th century because they would be persecuted in their own countries, but not here.