Rubber Soul and Revolver are the Beatles' best, imo. I did like their '67 - '70 albums as well, just not as much. The White Album would've been much better if pared down to a single record. Way too much filler on it.
The Stones' Their Satanic Majesty's Request was a misguided attempt to make a Sgt. Pepperesque album. Even Keith said he was embarrassed by it. The Stones really hit their stride after that with their best run (from '68 - '72....Beggars, Bleed, Sticky, and Exile), which imo might've been the best of all runs from anyone.
If the Beatles took the 5 best songs from Pepper and combined them with the 5 best from Magical Mystery Tour (released later that year), it would've been a much better record.
Good observations, all.