John Wesley Harding has a very good album out called "Trad Arr Jones". It's not a pale imitation of life as Harding manages to put something of himself into too.
Martin Carthy is an (obvious) nomination, as is his daughter, Eliza.
Jez Lowe's a remarkable musician, whose laid back style reminds me a little of Nic Jones for some reason.
Have never met him, but Nic Jones would probably think it silly of someone to say you wont enjoy an artist if they aren't considered as great as Nic.