Fair point on Meta, it was the first company that came to mind and I didn't do any investigation to see if it was representative. It's also a company and not individual contributions like the graphic you shared.
I still don't think it's useful to look at total spend to each "party" vs the spread of spend from each source and what they are targeting. I'm not arguing against the idea that billionaires are seeking to influence elections. Of course they do. But what I think is important to consider is what specific races they are funding and why.