I would have said Basil, but as it wasn't performed, as in the question, I chose MM, because I love it on both the album and live.
How do you mean "wasn't performed?" It's on the record, isn't it?
I'd probably go for Basil, although MM and Laughs come close.
I also agree it is a travesty it wasn't performed live, especially when Ruth was on hand. Instead he opted for the clichéd snoozefest Wherever I Go (which has an amusing acronym)!