Solunars by Aldebaran Sidereal Academy

Jimi Hendrix
Frank Zappa
Keith Emerson
David Byrne
Brian Adams
Kurt Cobain
Dave Grohl (rising)
Les Claypool
Billy Corgan
Howard Roberts
Marlyn Manson
Jeff Zampillo
James Condor (rising)

That's interesting. I think the proper focus is on what distinguishes these guitar players (style, ability, themes, etc.) from other able guitar players.

I mention that because Mars spends more time in Libra than in most other signs. Any sufficiently large sample of Mars placements will have the greater numbers in Cancer through Libra, and the least in the opposite signs; so excesses in these signs does not per se mean anything unless the excess if quite excessive.

It does, however, offer you more examples to scrutinize to see what distinguishes this one sign type from others.

As for adding names, I don't have many guitar players in my collection but here are a few: Kurt Cobain, David Byrne, Keith Emerson, Marilyn Manson, and Howard Roberts.

Great, you've added some well known names.