Vic: The OP distinctly said he wasn't looking for true source traditional singers like those you mention, but

- 'the category of "Revivalist" and NOT "source" singers such as Fred Jordan/Harry Cox and Sam Larner' -

so your list, tho unexceptionable in their category, were/are explicitly the ones he was not seeking.

Shirley Collins must of course go along with June & Maddy & Isla on my female singers list above. Also Peta Webb.

~M~