My nominations for the three best composers of popular songs are:
1. Antonio Carlos Jobim. (Chega de Saudade, Dindi, Samba de Uma Nota So, Insensatez, Desafinado, Corcovado, Favela, Agua de Beber, Vivo Sohando, Chovendo na Roseira, Aguas de Marco, Amor en Paz/Once I Loved, O Grande Amor, So Danco Samba, Doralice, Meditation, The Girl from Ipanema, etc.)
2. Duke Ellington
3. George Gershwin
After these three, there are many notables: Jerome Kern (All the Things You Are, Yesterdays, A Fine Romance, Dearly Beloved); Irving Berlin (Always, Isn't This a Lovely Day, Blue Skys, Cheek to Cheek); Richard Rogers (Blue Moon, Thou Swell, Bewitched); Cole Porter (Easy to Love, Just One of Those Things, What Is This Thing Called Love, Begin the Beguine); Burt Bacharach; Paul McCartney