Woah, dude, you're related to Jack the Ripper? That's kinda cool!
(Actually, a friend of mine in London is really into genealogy, and has become a Ripper enthusiast. Why? He learned that a relative from that time was a prostitute who was murdered, and was speculated by some at the time, and by some experts today, to have been an early Ripper victim.)
Trying to think if there's anyone other than Billy Graham in my family (he's something like a second or third cousin of my grandpa, but getting the straight answer is tough since it's always a rambling discussion that includes the words "No, he was ____, because I remember him coming to ___ when he was ___ years old").
I've got one cousin who was some sort of low-level official in the Bush administration (needless to say, we see not eye-to-eye), and another from the same branch who's a sax player for one of those insanely talented female soul singers who probably will never hit Adele levels of stardom. (The iTunes single of the week is about the pinnacle of their career thus far, not that I'm saying that's nothing.)
My brother-in-law fancies himself a rapper and is actually pretty good and could probably be a one-hit wonder if he had more discipline and wasn't a hanger-on. He appeared in one incredibly shitty, but somewhat successful because people are stupid, movie (Two Can Play That Game). Nice guy, but he can't act to save his damn life.
My wife's dad claims they're related to some or all members of the folk group, The Weavers.
My mom's told me before that there were minor members of the British aristocracy in our lineage about 100 years or so ago. (Not sure if they lost touch with the rich folks when they came here or what; my entire extended family's been dirt poor for ages.)
Two that I think are the coolest are two I've not confirmed, and one isn't technically my family tree unless you're branching out quite a bit. My uncle and cousins in one branch (my mom's sister's husband) claim(ed) to be descended from the last survivor of Custer's men at Little Big Horn. I have confirmed his name, and it matches theirs, though historians seem to pronounce it differently. (Granted, people pronounce their name like his a lot.)
Second, my grandmother was part Indian from the Lumberton area of North Carolina. I always assumed Cherokee, since everyone in North Carolina claims to be exactly 1/16th Cherokee, from generation to generation. But it was more likely the Lumbee tribe, which was sort of a hodgepodge of smaller tribes (and some Cherokees and other larger tribes) sort of thrown together by white assholes. Immediately following the Civil War, there was a fairly famous group of (mostly) Lumbee vigilantes who fought the Confederate Home Guard (the sort of intermediary step between the Confederate officers and the KKK), called the Lowery Band. (If you've watched the History Channel, they've told their story, though completely incorrectly, by claiming they fought during the Civil War and possibly were allied with Sherman, none of which seems to have any basis in reality or anything that was ever said prior to that program airing, and would certainly not jive with the age of the leader.) Anywho, the second-in-command of this group shared my grandma's surname, which isn't particularly common. I suck pretty badly at genealogy myself and haven't been able to confirm the connection, if any.