Yes, I've decided I can't top him for 50's.
Looking at one from 60's, I grew up listening to early Zeppelin, but turns out most of I & II were rip-offs... some from Howlin' Wolf anaw! Still good though. Their loud and heavy arrangement must have come from Marshall amps and Jimi Hendrix ...so thought about All Along the Watchtower, but it's a cover of Dylan apparently taking the piss. Still great, and I cannot find Dylan's original, and it seems he then covered Hendrix covering him.
So feck it, I'll go with The Small Faces - All or Nothing, which I think I picked up from the TAMB as some old bugger must have posted it. I was reluctant to pick it as it sounds like Steve Marriott is making a case to get his leg over. It's a breakup song however.