Some other names to consider(off the top of my head) and there many more I could add

Scottish
Mick West
Lyra Celtica
Back Of the Moon
The Emily Smith band
Ian Bruce

Irish
Maurice Dickson
Anthony John Clarke
All the Sands Family
Rosemary Woods

Following the theme of "Cool as Folk" i know two guys that go out as "Folk in Hell"

Good luck with the programme.