I was thinking Kaido because he has a precedent for using others to do his dirty work with Doffy overseeing the SMILE production. So Israel can be Donflamingo, especially with their illegal occupation (though Dressrosa would be closer to Cuba pre-revolution, they are not part of this story). The one bankrolling Doffy would be Kaido.
What is stand in for the west here, would it be big mom. Big mom loves her treats.
spoiler
I was thinking Kaido because he has a precedent for using others to do his dirty work with Doffy overseeing the SMILE production. So Israel can be Donflamingo, especially with their illegal occupation (though Dressrosa would be closer to Cuba pre-revolution, they are not part of this story). The one bankrolling Doffy would be Kaido.