If by that you mean, playing "off" the melody and going beyond roots and fifths and runs, then I'd look at stuff like Lucy in the Sky With Diamonds and Fixing a Hole and, well, the aforementioned (by me!) Something.
Bass is practically the lead instrument here. Nothing too difficult, but it's brilliant for the song. And wonderful work by Ringo in that song, too - in his view, his best drumming ever.
You should look into buying the beatles 'complete scores' book. It's around $60 But, is well worth the money.
I've always loved the bass for 'Hey Bulldog' & 'Being for the Benifit for Mr. Kite'. They are pretty simple. George harrison's bass on taxman is of course something to consider.