There are three artists who go by the name Dan Smith.

1) Dan Smith, lead singer of the English rock band Bastille, released music under his own name before 2010.

2) Dan Smith, also known as Southpaw, is the preacher and frontman for Momentum Christian Church in Cleveland Ohio. Dan uses humor and stories to communicate his points and connect with his congregation and listeners.
Dan Smith's personal website: http://www.whiteboyDJ.com

3) Rev. Dan Smith (January 23, 1911 in Alabama - November 16, 1994) sang in church and played harmonica as a child. He didn’t begin his professional career until the early ’60s, when he played behind folk legends Rev. Gary Davis and Pete Seeger. However, his musical style is overwhelmingly oriented to Chicago blues.