- Frank Sinatra (1915-1998): Known as "The Chairman of the Board," Frank Sinatra was an American singer and actor who is widely regarded as one of the greatest popular singers of the 20th century. He is known for his smooth, velvety voice and his ability to interpret a wide range of musical styles.
- Elvis Presley (1935-1977): Known as "The King of Rock and Roll," Elvis Presley was an American singer and actor who is regarded as one of the most significant cultural figures of the 20th century. He popularized rock and roll music and is credited with helping to break down racial barriers in the United States.
- Michael Jackson (1958-2009): Known as "The King of Pop," Michael Jackson was an American singer, songwriter, and dancer who is considered one of the most influential entertainers of all time. He is known for his distinctive vocal style, his complex dance moves, and his innovative music videos.
- John Lennon (1940-1980): Known as a member of The Beatles, John Lennon was an English singer-songwriter and peace activist who is regarded as one of the most influential musicians of the 20th century. He co-founded The Beatles and wrote some of the band's most iconic songs, including "Imagine" and "Strawberry Fields Forever."
- Freddie Mercury (1946-1991): Known as the lead singer of Queen, Freddie Mercury was a British singer and songwriter who is regarded as one of the greatest vocalists of all time. He had a four-octave vocal range and was known for his flamboyant stage persona and his powerful vocal performances.
- Luciano Pavarotti (1935-2007): Known as one of the "Three Tenors," Luciano Pavarotti was an Italian operatic tenor who achieved international fame and popularity. He is regarded as one of the greatest operatic singers of all time and was known for his powerful voice and his ability to reach high notes with ease.
- Andrea Bocelli (born 1958): Known as one of the "Three Tenors," Andrea Bocelli is an Italian operatic tenor and multi-instrumentalist who has achieved international fame and popularity. He is regarded as one of the most successful operatic singers of all time and is known for his powerful voice and his ability to reach high notes with ease.
Again, it is important to remember that music is subjective and that different people have different preferences when it comes to singers. This list is not meant to be definitive or exhaustive, and there are many other male singers who could also be considered among the "best" of all time.