Ruby Wax

American ex-pat who's lived in the UK for many years and I think is married to a Brit. Works mostly as a script-editor for shows such as French and Saunders and Absolutely Fabulous, with the occasional foray into docu-interviews - she was doing Louis Theroux while he was still walking Michael Moore's beats for the excellent TV Nation.
Razor-sharp and with an eye for the absurd, but apparently found irritating by much of the population, she's kind of the XX-expression of the genotype to which Danny Baker is the XY-phenotype.
I for one wish that her late night BBC2 dinner-party chat-show from circa 1997 was still going though.