Jackson Pollock, an abstract expressionist painter who is mentioned by Jacobs in the book, has a picture but needs a biography and is unconnected as of yet.
Jeffrey Dahmer, a convicted serial killer, is also mentioned in the book. He has a picture, a short bio, and is connected.
Albert Einstein was already featured as an EPOW, as was Martin Luther King Jr. and George H. W. Bush. They can still be in the connection finder.
Alex Haley, the author of the 1976 novel Roots: The Saga of an American Family, is mentioned in the book as well. He is already connected with a biography and a picture.
Also mentioned is Thomas Jefferson, the third President of the United States. He does have a biography, a picture, and a connection, even though he is not an EPOW as of yet.
Brigham Young, the leader of The Church of Jesus Christ of Latter-day Saints who was the namesake of Brigham Young University (BYU), is mentioned by Jacobs through Jeopardy! champion Ken Jennings' trivia question as a great-great-great-grandfather of Steve Young, an NFL quarterback for the San Francisco 49ers who also played college football for BYU. Brigham Young was already an EPOW. Steve Young and Ken Jennings are still living.
Mary, Queen of Scots, was not mentioned in the book. However, she was mentioned in a TED talk Jacobs gave in March 2014 in Whistler, British Columbia. She is already connected with a picture and a biography. This profile is not an EPOW yet.
There may be other people mentioned in the book or his TED talk, like Karl Marx as well as other European aristocrats besides Mary, Queen of Scots. Several are still living. Of course, Marx is already connected to the main tree, has a biography, and has a picture. I cannot find any references to Marx in Jacobs' book.