Okay, if limited to the artists listed, you can add my to the choir- The Beach Boys are the best of the artists listed and also the case where you seem to have missed the most key recordings. So it's pretty much a no-brainer.
That said, I'm no completist and though The Beach Boys are one of my favorite groups, I'll almost definitely never do what you're doing, because they released some depressingly hideous stuff. I wound up just saving the tracks from the pre-"Today" albums that I didn't already have on various comps (minus those lame instrumentals that I have no use for) which amounts to like 2 discs worth of early BB's tracks which mostly range from endearingly cheesy to shiny pop goodness.
As far as actual albums are concerned, I'd rank the ones I've heard that you've missed like this:
You can definitely skip "Party" but the others are all worth checking out. As for the others, you might wanna just stick to comps, the best of which are "Endless Summer" and the "Good Vibrations" and "Made In California" boxes.