Prince is still cranking out albums as well. If you're just going by songwriting credits, Prince would win by a landslide. He wrote songs for practically everyone for 2 decades.
Damn straight. Going by Wikipedia, he personally has 25 studio albums plus five soundtrack albums and at least one boxed set of original material along with four more internet only albums (before the internet ended, apparently). On top of that, he created the groups The Time (4 albums with his input, 3 of them where he did most of the recording himself), Madhouse (2 albums), The Family, Vanity 6, and Apollonia 6 (1 album a piece). He also produced whole albums for Sheila E. (3 albums), Mavis Staples (2 albums), Eric Leeds, Ingrid Chavez, Carmen Electra, Jill Jones, Mayte Garcia, Martika, and Chaka Khan. He has also contributed songs here and there for Sheena Easton, Mazarati, Tevin Campbell, and Patti LaBelle. He can also be credited with discovering folks like Sheila E. (arguably one of the finest drummers around), Jimmy Jam and Terry Lewis ( founding members of The Time and fairly prolific record producers in their own right, with 16 #1 singles to their credit, with Jimmy Jam additionally being Chairman Emeritus of the National Academy of Recording Arts and Sciences), Wendy & Lisa (founding members of The Revolution with a respectable solo career of their own, now spending most of their time as composers for television shows - they won an Emmy for the
Nurse Jackie theme song), and a slew of artists who have been fairly successful outside the Prince camp.
Love him or hate him, Prince is one of the more influential
and prolific musicians of the last thirty-two years.