I think it is worth mentioning the music work of Meic Stephens of West Wales who has made a number of albums which are worth exploring .His is a notable name in the cannon.

Also I think the "Men They Couldn't Hang "did a brilliant song about the Crawshays ,the ironmasters of Merthyr .I cant remember the title but I am sure there is a Mudcatter out there somewhere who can!!!
Ifor