I found a way to list the music on my PC by amount. I've put a lot of CDs on here! My top 5 are:
Joe Satriani 10 albums, 123 songs, 10 hours
Flecktones 10 albums, 118 songs, time not given
Victor Wooten 7 albums, 74 songs, 5.7 hours
(that's a whole lotta Vic right there!)
Kathy Mattea 8 albums, 86 songs, 5.2 hours (I met her once)
Jimi Hendrix 5 albums, 60 songs, 5.2 hours
Rounding out the top 10 are Jaco, the Beatles, the Neville Brothers, Cream and Stevie Ray Vaughan. Jaco would be #3 if you lump in the Weather Report tunes.

But that would push Jimi out of the Top 5!
So how do yours rate?
Edit: What about the Bottom 5?
Mickey Gilley 4 songs, 11 minutes
Brent Mason 6 songs, 18 minutes (he's great, I need a lot more of his stuff)
Lynyrd Skynyrd 5 songs, 19 minutes (Free Bird is NOT one of them!)
J. Geils band 5 songs, 21 minutes
The Ohio Players 4 songs, 21 minutes