Most everybody great has been mentioned, as well as some not so great, but I am going to through someone in who should be on the list of the greatest songwriters of the 20th Century, and usually isn't, Vietnam's Trinh Cong Son

Even if you don't understand the language, the soul of a ravaged land pours out-

The page above is a comprehensive collection of recordings, and lyrics are at one of the links at the top--Many are sung by Khanh Ly, whose voice is perfect for his material--