Everybody’s Top 5 - Vinyl

Clearthinker - most people have no idea who Sandy Denny was talking about tragic. My favorite work with her at the helm would be Liege and Lief. After about 1/2 hour of Shut Up my eyes start to cross. I guess I prefer Zappa's solos in the context of his songs. He gets so technical sometimes the sole is missing, the mirror image of Duane Allman. I do love Uncle Meat and Burnt Weeny Sandwich. Call Any Vegetable probably has his most famous guitar solo.  

Thanks for the response @Mijo

Here in the UK Sandy was far bigger than stateside.  She was born in Wimbledon where I grew up, just a couple of years older than I.  Her brother was at my school.
I agree about Liege and Lief.  I listen to it often.  It is Fairport's masterpiece and perhaps the centrepiece of folk-rock because it retains the folk idiom in a way that, say, Mr Tambourine Man does not.
It would be in my next 5 if OP had permitted.  But listen to Grassman again - it showcases her wonderful voice in a way L+L cannot, as well as some wonderful quiet introspective songs.

Zappa is surely by far the most under-rated rock guitarist of all time, tragically taken as he was about to break further into the world of serious orchestral music, financed by his rock career.  I take it you have heard the orchestral releases?

Clearthinker, all of them. I have everything Frank ever recorded and released. Certainly, The Yellow Shark is SPECIAL. The fact that he got those guys to play G-Spot Tornado blows my mind. 

Why Fairport and Sandy did not make it in the States is beyond me. Richard Thompson has a huge following here now. Anyway, Sandy threw herself down the stairs one to many times and Who Knows Where the Time Goes has been recorded and attributed to just about everyone else:-(

Impossible to narrow it down to a top five.  At least it is for me.  But, is the question about sonic qualities or simply great music.  Some great music doesn't sound very good and some sonically superb recordings is just flat boring music.  I keep getting sonically wonderful recordings of great music almost weekly, hence why it is so difficult for me to chose a top five.

Beatles White Album

Best of The Rolling Stones 

Saxophone Colossus with Sonny Rollins 

Surrealistic Pillow 

Best of Jethro Tull

RUSH - 2112
Pink Floyd - Dark Side of the Moon
Tragically Hip - Fully Completely
Kraftwerk - Autobahn
Talking Heads - Remain in Light

Honorable mention:
Alan Parsons Project - I Robot
Dire Straits - Dire Straits (first album)