Specifically I'd consider the main title to be: "billionaire board" the title caption to be "These are the world's most powerful people. Let's track their impact & inspire them to do more good, starting with COVID-19." and the subtitle "Top donors this month" - on further reading it looks like this might work a lot better if the subtitle was considered a content title in the case where there were multiple content blocks each with a separate ranking or grouping that needs description.