yeah... Live Wire by the Meters, not really your average blowout guitar solo, but, it's mighty cool and has great feeling...

But, if you're more into long "heavy" solos, the ultimate song is:
(George Clinton and the Parlament) Funkadelic - Maggot Brain
This song is insane, it blows your mind and penetrates your soul. It makes me cry, it's so loaded with feelings it's unlike anything i've ever heard.
The guitar really weeps...

And, we must not forget Five to One by the Doors.
Robbie Krieger has one of the coolest "sounds" ever.

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Can you picture what will be
So limitless and free!