All 3 are amazing talented songwriters and producers!!!
All 3 can write some EPIC love songs!!!
However rate from best to least!!!
MC - written 17 no1 hits more than any other female writer or producer in music history ... Her writing is so impeccable songs like The Roof, Breakdown, AIWFC, Butterfly, Close my eyes etc
Alicia Keys - Brilliant songwriter & producer & has written for other A list artists such as Whitney & Christina
Adele I would rank her last on this list tho she is just as amazing!