I don't think, apart from "The Beatles" that I was ever blown away by any particular person or groups music but there have been songs that have blown me away at the time.
"Nights in White Satin"...The Moody Blues is probably the most memorable.
Clifford T Wards "Where did we go wrong"
Glen Campbell..."Wichita Lineman"
Steeleye Span.."All around my hat"
Many more...too many to mention
Best wishes, Mike.