The first songs I heard from Van Morrison were from the album Moondance in 1970.    From that album were a number of memorable songs like And it Stoned Me, Caravan, Into the Mystic,  and others.    I bought the vinyl album and played it many times, then bought more of his albums, probably 15 in all, and I have continued to listen to him even 50+ years later.   He has had many accolades over the years and there are many other fans.  

He has many memorable songs, any of which could be chosen, but one from Moondance is shared here: