I have no idea how many other people know of this guy, or have seen his work (and realised it) but he was the go-to guy for photographs of rock stars.
From Wikipedia:
The following album covers feature Rock's photography:
The Madcap Laughs Syd Barrett (1970)[38]
Deuce Rory Gallagher (1971)
Transformer Lou Reed (1972)[39]
Lonesome, On'ry and Mean Waylon Jennings (1973)
Raw Power The Stooges (1973)[39]
Foreigner Cat Stevens (1973)
Pin Ups David Bowie (1973)
Queen II Queen (1974)[39]
The Psychomodo Cockney Rebel (1974)
Don't Be Fooled by the Name Geordie (1974)
Sheer Heart Attack Queen (1974)
Coney Island Baby Lou Reed (1975)[39]
Silly Sisters Maddy Prior and June Tabor (1976)
Rock and Roll Heart Lou Reed (1976)
Timeless Flight Steve Harley & Cockney Rebel (1976)
We Have Come for Your Children Dead Boys (1978)
The Candidate Steve Harley (1979)
End of the Century Ramones (1980)
Come Upstairs Carly Simon (1980)
I Love Rock 'n Roll Joan Jett & The Blackhearts (1981)
The Blue Mask Lou Reed (1982)
Teaser Angela Bofill (1983)
Nightlife - Cobra Verde (1999)
Out of the Vein Third Eye Blind (2003)
The Quality of Mercy Steve Harley & Cockney Rebel (2005)
Parallax Atlas Sound (2011)
Underneath the Rainbow Black Lips (2014)
Plastic Hearts Miley Cyrus (2020)