When Soundgarden Rocks asks for classic rock albums, I`m 99% certain that he`s referring to essential rock albums so here are 10 essentials from the 1960`s and Soundgarden if you already have any of these, I`ll replace them with other albums. All these albums have 1960`s release dates, I`ll suggest some 70`s stuff later.
Beatles- Sgt.Peppers Lonely Hearts Club Band
Beatles- Abbey Road
Beatles- White Album
Kinks- The Kinks Are The Village Green Preservation Society
Kinks- Something Else By the Kinks
Buffalo Springfield- Buffalo Springfield Again
Byrds- Fifth Dimension
Byrds- Younger Than Yesterday
Led Zeppelin- Led Zeppelin I
Led Zeppelin- Led Zeppelin II
Free- Tons of Sobs
Doors- Doors
Doors- Strange Days
Love- Forever Changes
Jimi Hendrix- Are You Experienced?
Jimi Hendrix- Electric Ladyland
MC5- Kick Out the Jams
Captain Beefheart- Trout Mask Replica
Grateful Dead- Aoxomoxoa
Jefferson Airplane- Surrealistic Pillow
King Crimson- In the Court of the Crimson King
Creedence Clearwater Revival- Green River
The Band- Music From Big Pink
Zombies- Odessey and Oracle
Moody Blues- Days of Future Passed
Mothers of Invention- Freak Out!
Velvet Underground- White Light/White Heat
Who- The Who Sell Out
Who-Tommy
Pretty Things- S.F Sorrow
BTW there`s a bit more than 10 here
But any serious music lovers should have these albums in their collection imo.
BTW I don`t like the Rolling Stones but even I`ve got "Beggars Banquet" and "Let it Bleed" so maybe you want to consider these and even the borefest called Bob Dylan.