It's tough as there are so many Stones albums to choose from, Let It Bleed, Get Yer Ya-Ya's Out!, Sticky Fingers, Exile, etc, etc, but my personal favorite four Stones albums are probably:
Out Of Our Heads (US)
Aftermath (US)
Their Satanic Majesties Request - to me, this is a very underrated album.
Beggars Banquet
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