Not a fan in the slightest, but Suspicious Minds by Elvis is a well constructed pop song and the ‘fat Elvis, jumpsuit combo’ live performance just tops it.
Surely something from the Beach Boys or Beetles would be a contender. Sloop John B, wouldn’t it be nice Twist and Shout, Come Together. Again, I’m not really a fan of either.
Bringing personal feelings in to it I’d say, on the rock front, any of CCR’s stuff. Mr Fogerty had a crazy three album run, full of amazing songs that still stand up today and are liked by fans of metal, rock and pop. Pity he burned out. The quality output in such a short time was phenomenal.