They have a members roster at the website (if you trust it).
A few names I noticed:
James Baker III
Frank C. Carlucci
Zoe Baird
George Soros
George Clooney
George R. Stephanopoulos
Lawrence H. Summers
Chuck Hagel
Gary Hart
Franklin D. Raines
Dan Rather
Condoleezza Rice
Paul D. Wolfowitz
Robin Wright
David H. Petraeus
Janet Yellen
And that was a quick look. I’m sure there are many more I didn’t run across
Is there anything Soros isn’t involved in?