You do realize that Prince's music is so diverse that his fans choices are gonna be even more diverse so your gonna get more than one album as a response right? That bein said try these.....
Prince (1979)
Dirty Mind
Controversey
1999
Parade
Sign O' The Times
The Black Album
You better just get all teh greatest hits albums bc Prince has so many albums and some out of print or impossible to find. I got most his shit in original for, greteast hits or downloaded off the net