For me, as for most people, I guess, 'She's Not There' was the only really solid reference point when the Zombies were mentioned. It is a very memorable song. A few years ago I heard Colin Blunstone and Rod Argent talking on the radio and this prompted me to seek out a Colin Blunstone album. It quickly became a favourite and this track showcases his very distinctive voice.
I knew nothing about 'Odessey and Oracle' until my son mentioned that they were reforming the original line-up to play the whole album live for the first time ever (the band broke up even before it was originally released). He sent me the album and got us tickets for the show. Both were great. You can see why it is often described as a classic album - there's not a duff track on it and some of the songs are indeed up there with the best of the Beatles' stuff. You really do need to listen to the whole album but the striking opener, with its unusual story-angle, makes a reasonable taster.
Colin Blunstone - Say You Don't Mind (iTunes)
The Zombies - Care of Cell 44 (iTunes for the album)