Another one or two just came to mind (all on US):
Greta van Sustren on a DCA-CLT flight when she was connecting to Aruba to cover the girl's dissapearance a little while back (she was in 1F, I was in 3C on a A319 or A321).
And the one that still cracks me up: Richard Simmons on a flight about 2 years ago around mother's day PHL-LAX. He had a small entourage, and actually does wear those freakishly small shorts and tube socks out in public. Also travels with his own very large pillow. He sat in 1F (I think) and I was in 4-something.