A singer and a guitar - since a good voice is very rare - BTW Alison Kraus is a croaker IMHO - it used to be a treat to hear a good singer -hence folk clubs- nowadays any old croaker will do.

Fiddles - they come and they GO - tg. The players are arrogant bigheaded and rude, they abuse other musicians with their tasteless humor, the insult my ears with squaky out of tune sounds and screech like some insane teenage female ape in search of a mate. Enough already.