Nope. A lot revolves around them, but there are plenty of ultra-rich ideologues pushing their agenda this way. You can find some good investigative research on this in "Dark Money" by Jane Mayer, which details a lot of the history behind dark money influencing politics, and the ideals these guys are trying to advance.

The Mercers are another influential family she's written about [0]

[0] https://www.newyorker.com/magazine/2017/03/27/the-reclusive-...