this fits perfectly into your criteria Lenny ( I think)

Del Amitri "Always The Last To Know"

Teenage Fanclub 'Sparky's Dream'

ps. I love 'Where I Find My Heaven.' Pure pop perfection

Because I can't see many better than this.

Badfinger: "No Matter What." It also complies with rules requiring a false ending, some slide guitar and a drums-only section that doesn't exceed 3 seconds. BTW, what a compilation LP this thread would make - great choices team!

.....a 45 single.

No 12", no coloured vinyl, no picture disc, and have it as a stand-alone record away from an LP.

You'd do worse than to call it 'Paperback Writer'.
(Arranging for England to win the World Cup the following month is, of course, an optional extra.)

Perfect pop by poppets

Small Faces "All Or Nothing"

Could have been perhaps should have been but hey they were monsters of heaviosity man.

Led Zeppelin "Livin' Lovin' Maid"

isn't the fact that none of them were ever stupendous pop smashes ( i.e. staying at number one for weeks on end ) rather diminishes their exemplary or demonstrative qualities? By the criteria of 'pop' one might argue that the likes of Baccara or Pussycat had a firmer grip on the format.

written by the 'Walking on Sunshine' hit-maker, Kimberley Rew
'Simple Pleasures'

Duel - fits all criteria, and is brilliant in all respects.