Even if i live in Bretagne, i'm not a real specialist of Breton folk-rock

The albums i have on CD :
Alan Stivell (the more famous Breton artist) :
-Telenn geltiek (1961) - instrumental harp
-Reflets (1970) - folk-rock
-Olympia concert (1972) - live Paris
-Chemins de terre (1973) - folk-rock
-E dulenn (1975) - live Dublin
Dan Ar Bras (ex Alan Stivell & Fairport Convention) :
-Douar Nevez (1977)
Tri Yann (pop side of Breton folk-rock)
-An naoned (1972)
-Suite gallaise (1974)
-Inventaire (1970-1993)
Seven Reizh (the best actual prog band)
-Strinkadenn Ys (2001)
-Samsara (2006)
Now adding to Wallace's list :
-Ar Skloferien
-Asgard (not the UK one)
-Bleizi Ruz
-Folkdove
-La Godinette
-La Mirlitantouille
-Orion
-Satanazet
-Skolvan
almost all from the 70's
+ a LOT of actual folk bands

And here is a list of similar French folk :
Mailcorne, Mélusine, La Bamboche, La Chanterelle, Le Claque Galoche, Le Grand Rouge, La Kinkerne, René Werneer, Lyonesse, La Confrérie des fous, La Chifonnie, Bill Deraime, Alain Giroux, Eric Kristy, Mick Larie et Jean-Marie Redon, Jean-Jacques Milteau, Youra Marcus, Gérard Dole, Grop Rosamonda, Lambrusc, Miqueu Montanaro, Mont Loia, Rosina de Peira, Perlinpinpin Folc, Riga-Raga, Los del Sauveterre, Roger Siffer, Géranium, Les Luschtiga Malker, La Manivelle, Chalibaude, La Chavannée d’Montbel, Ellébore, Maluzerne, Tarentule, Café-Charbon ...
I think Dague is from the South of France.
If you want something from my Breton CD list (top of the page), tell me
