Plácido Domingo, is a Spanish tenor, known for his versatile and strong voice, possessing a ringing and dramatic tone throughout its range.
http://www.youtube.com/watch?v=_CkV4KJc-QE

Enrico Caruso (February 25, 1873 – August 2, 1921) was a famous Italian tenor and a key pioneer in the field of recorded music.
http://www.youtube.com/watch?v=Y2eWglxp6g0&feature=related

Luciano Pavarotti (12 October 1935 – 6 September 2007) was an Italian operatic tenor, who also crossed over into popular music, eventually becoming one of the most commercially successful tenors of all time.
http://www.youtube.com/watch?v=2uYrmYXsujI

( 1946 - )

Andrea Bocelli is an Italian tenor. He has recorded over 20 pop and classical albums, including seven complete operas.
http://www.youtube.com/watch?v=YbGKQ8YASCY&feature=related

Fritz Wunderlich (September 26, 1930 – September 17, 1966) was a German tenor, in April 2008, Wunderlich was voted the fourth greatest tenor of all time.
http://www.youtube.com/watch?v=0TnruLf_haY