Arizal is the most contemporary Rabbi to specify gilgulim in his teachings that I have studied, but I know others have come after Arizal who also dealt with the subject and could have specified who the past gilgulim were of more modern figures. For instance, who were the prior gilgulim of Napoleon? Of Hitler? Of Mao? Of the Dalai Lama? Of Abraham Lincoln? Of Einstein? There are too many to list but I would be interested in lists of prior gilgulim for any known historical figure. They can be pre-Arizal also, since I'm sure I don't know all pre-Arizal either, and there are likely multiple opinions on some figures.