Glad to see the Animals getting some run - House of the Rising Sun ticks all the boxes. It's a folk song that bridges the setting of the folk movement and predictive of the arrival of the psychedelic rock movement which will come to typify 60's music for me.
God Only Knows is the only better love song, but since the Association hasn't been mentioned, check out Never My Love. I mean, come on.
So many things going on here that are hallmarks of 60s music making. The Association were wizards in the studio. They were way ahead of the curve - Jimmy Page before it was cool to be a production nerd.
Another 60's gem, which captures the decade's fascination with creative vocal syncopations is Along Comes Mary. Is anything MORE 60's than this?
But for my money, Tommy James and the Shondells Crimson and Clover is so perfect it's almost anachronistic. It's everything we knew about making music in the 60's perfected. The complex guitar strums and mutes, highly experimental use of tremolo effects, openly interpretable lyrics, a break down for the ages, and probably about drugs or maybe illicit sex.
How stoned must they have been?