I think theres a lot of categories to consider. Is there a guy who vaccuums carpets better than anyone else in the world???Well who cares??? I think that famous people in this industry are people in the restoration and paint correction biz. Does that really fall into the detail category? Sure your detail guy may be able to compound and polish your car but hes not a restoration proffesional, hes a paint correction guy not Chip Foose, Just sayin....
This illustrates a point made above...Put Chip Foose out on a red carpet in countless areas around the country and a fair majority of people couldn't tell you who he is. I don't watch his program and I couldn't point him out in a crowd of three.
I also agree with RFTexas' comment. There are probably more than a few detailers who are famous and or legends, unfortunately it is likely only in their minds and a sparse number of "fans".