These are the three I HAVE to have, due to their sonics and sheer musicality.
John Coltrane & Johnny Hartman
Supersax Plays Bird
Just For A Thrill (Weslia Whitfield - a little rare, hard to find, but worth it)
Here's a rip from vinyl.
Building a 100 album vinyl collection 3 must have albums are?
No opera or rap in the three must haves. Sorry.