"Best" or "greatest" is impossible for something like this. How do you compare Son House with Joe Bonamassa? I always just go with "favorite." For acoustic I like Son House and Lightin' Hopkins among others. For electric I like B. B. King, Jimi Hendrix, and SRV among others. Though Hubert Sumlin (Howlin' Wolf's guitarist) needs to be mentioned.
Guitars: Epiphone Les Paul Ultra; pretty red Squier Acoustic;
Amps: Vox VT30;
Pedals: Dunlop Fuzz Face; Dunlop Crybaby Wah
My kids have: Squier Affinity Stratocaster MII; Fender G-DEC; Squire Acoustic; Jay Turser Strat-copy, Roland Cube amp
"I am a sworn enemy of the saccharine, and a believer in grace over karma." Bono 2001