One would seem boring, so here's a small list more relatable to the US crowd:
2 US Presidents
5 signers of the Declaration of Independence
Numerous politicians and Generals
1 Attorney General under both George Washington and John Adams
4 were on the Mayflower
Just recently found out my 4th Great-Grandfather wrote the Texas Constitution
My 13th Great-Grandfather was the largest slave-owner at one point
A Great-Aunt married a Shah - God help us!
And that's just the American journey of my ancestors. By the time my complete family history was completed regarding my direct line and surname, I was asked to write an apology at the beginning of the book. Whether is was Crusader Kings or Dukes that killed their father and brothers to take the title and land, massive slave-owners, and a Major Domo that had a Queen literally dragged to death (those Merovingians were crazy), it was just all so inhuman. It went from pride in service to the US to wishing it could've ended there. The only positive note that came of it all with all the wars and disgusting politics, was the realization that with each passing generation we've become more civilized, with less regret and more to be proud of.
Something that should also be noted is the lack of pride to really have in these ancestors. Not only for the fact that the farther back the more inhuman they seem, but also for the fact that we are not reminded enough of the fact that we are all related and we should all treat each other more humanely and with brotherly love. If we did, the world would be a much better place!