Not even the best Beatles album, but it IS the most influential and a great album.
I lean more toward Abbey Road, Rubber Soul or Revolver. Heck, I listen to Let it Be more than I do Sgt. Peppers.
That being said, any album that contains A Day in the Life is special. The Beatles didn’t make any bad albums.
Abbey Road is definitely their best. Not a bad song on it.
There’s no accounting for taste.