I think it's a little bit interesting to link up names of famous people that match first to last. For instance, Nicholle Tom -> Tom Arnold -> Arnold Schwartzeneggar. What is the longest possible one? If you insist on including Arnie, I think your only possible path is backwards from there, and I hadn't heard of Nicholle Tom until I went looking. I'm sure there are others.
Mokalus of Borg
PS - I can't find anyone working backwards from Kevin Bacon.
PPS - Or forwards, for that matter.