From Rolling Stone:
Beards have been a hallmark of rock style since the Sixties, when the Beatles announced their adulthood by getting very, very shaggy. Facial hair on rock stars can range from the theatrical (Rob Zombie, ZZ Top) to the artfully scruffy (Thom Yorke, Bon Iver) to the meticulously detailed (pretty much any nü-metal band).
10. Rick Rubin
Rick Rubin has one of the most formidable beards in rock, and age has only made it more impressive. When he was younger, he looked a bit like Hagrid from Harry Potter, but these days, it’s more of a Gandalf the Grey look.
9. Scott Ian
Anthrax guitarist Scott Ian has been cultivating a distinct beard style for a few decades now – a thick stalk of dark hair jutting from his jaw, while the rest of his face and head is clean shaven.
8. Caleb Followill
Kings of Leon frontman Caleb Followill has a fairly modest beard, but it’s a big part of his character – one look at the dude and you get a good sense of his booze-loving, Southern rock spirit.
7. Jim James
My Morning Jacket main man Jim James has a great big mop of hair that’s complemented by an old-school rock beard. It’s a look that could be intimidating on some, but it brings out a sweet, gentle quality in his face.
2. George Harrison
All of the Beatles had beards in the second half of their career, but George Harrison stuck with the look much longer than his bandmates, making it a defining part of his physical appearance. It suited him well, highlighting his mellow charm and spirituality.
1. Billy Gibbons
ZZ Top is pretty much the ultimate in rock beards, but even in that crew, Billy Gibbons’ astonishingly long beard stands out. Beards may come in and out of fashion, but Gibbons has stuck with his look for decades, lending his band a visual flair on par with their guitar chops.