You get to pick your own. If you want to select Peter North, John Holmes, etc. that's up to you.So for this discussion, should there be an underlying theme? Contributions to [fill in the blank]?
Not going to lie, I'm concerned about your male pornstar knowledge
You aren't the only one...

A good friend will bail you out of jail, but your best friend will be sitting next to you in the cell saying "that was f***ing awesome"
Franklin, Hamilton, Douglass, Carnegie (for philanthropy)
21st century is tough. Gates and Musk are now quite tarnished.
"You can't make someone listen to reason if they aren't willing to think"-- Ray Bradbury, Fahrenheit 451
The harder, more divisive subject here would be: Mt. Rushmore of U.S. non-Presidents in the 21st Century.
I've been thinking about this off-and-on for a day now, and I just don't see how you put together a meaningful list when most of the potential candidates are still doing their thing, and the effects of their actions are still unrealized. I feel like any Mt. Rushmore is going to require the benefit of historical hindsight to do properly.
I bet we could come up with a 20th Century one, though.