I'm not going to argue that Taylor Swift doesn't deserve to be on the billionaire list somewhere, but if you were only going to include 4, why would she make the cut?
Three of those billionaires made their fortunes by stealing other's work and exploiting other's labor. I might dislike Taylor Swift's music but it is her music and her work that made her a billionaire. When someone stole her work from under her, she re-recorded it from scratch and then put on the most profitable tour in history with each show being 3+ hours long.
I'm not a Swifty, but I also don't think she qualifies to join that evil as fuck trio.