When I asked my husband this question, I was very surprised by his answers. It lead me to realize that it depends on your point of view. I was expecting the same answer as mine which was Atticus Finch in To Kill A Mockingbird.
I was thinking in terms of who would make a great real dad when my husband answered about a dad that truly entertained him. He answered Arnold Schwarzenegger in Jingle All the Way.
I said “What are you crazy? He is a total screw up and let down as a dad in that movie. I know he came through in the end, but before that he disappointed his son time after time.” My husband said that he was a totally entertaining dad and at least I hadn’t answered Darth Vader.