Bo Diddley is one of the top 10 pioneers/innovators in R&R, but, he is not anywhere near the top 50, or 100, or 200 when it comes to his skill on the guitar.
What he did was create a sound and a beat that every guitarist has used since 1957.
But inventing a sound and a beat doesn't make him a better axeman than you or I.
His influence is etched in R&R history, but not for his guitar playing abilities.
I love him

, I listen to his music

, I miss him

, I hear his beat every day in other bands tunes, but, again, as a guitarist, he shouldn't be on anyone's top guitarists list.