Unlike PA's health commissioner, Itt has an extremely high IQ of over 300, guessed every Rorschach Test correctly, and placed all of the pegs in the correct slots.
As for long hair, in the world of rock I thought The Outlaws took the prize.

RE Outlaws:
THAT is some magnificent hair... and some serious guitar players. Gonna put on “Green Grass and HIgh Tides” now.
RE Cousin Itt:
True that... and cousin Itt never wore a dress and pretended to be anything OTHER than Cousin Itt...
For country music, it had to be:

William Lee Golden 8>)
What about ZZ Top?