Sad news, another great one.   RIP.  

As far as the art of rhythm guitar don't forget about Keith.  Built a 50+ year band out of it.  
The list of excellent guitar players is extensive.

Style and ingenuity mark them as competent, special or genius.

One more ends his run and thankfully the repertoire left us is remarkably deep.

The loss is significant. AC DC was and is a major player in Rock & roll and elevated the bar to which other’s are going to be held for some time to come.
 Rest in Peace.

Robbie Robertson has said he used the playing of Pops Staples as his model for his playing in The Band. Robbie’s guitar "song parts" (as apposed to solos, the abilities at which being how most people access guitarists abilities) are supremely musical. A few more great rhythm/lead players are Steve Cropper (Booker T & The MG’s), James Burton (Ricky Nelson, Elvis Presley), and Albert Lee (The Everly Brothers, Emmylou Harris), all Telecaster players (as was Robbie on The Band’s first two albums).

Though commonly considered Hard Rock, I see AC/DC as a pure Rock 'n' Roll Band, the ultimate realization of Chuck Berry. It speaks to the teenager in me, even at 67!

Malcom also played with a relatively clean tone without distortion, just the right amount of natural overdrive plugged directly into a Marshall tube head.