I love Vai, Satch, and Gilbert as they have so many songs with no singing and amazing solos. Yngwie, Petrucci, and many others are great guitarists but I have to skip through 2 minutes of singing to get to their solos on most songs. Not a fan of buckethead. Greg Howe and some others are good, but have about one album worth of material.

Any good soloists who play instrumentals and have a decent amount of songs out?
We're just a battery for hire with the guitar fire
Ready and aimed at you
Pick up your balls and load up your cannon
For a twenty one gun salute
For those about to rock, FIRE!
We salute you