Who is affiliated with more bands, Ronnie James Dio or Luca Prodan?
Luca Prodan:  He was the leader and singer of Sumo, one of the most influential rock bands of Argentina, and is widely considered as one of the most important artists of the last quarter of the twentieth century in his country. Ronnie James Dio: Ronald James Padavona (July 10, 1942May 16, 2010), better known by his stage name Ronnie James Dio, was an American singer, songwriter, and musician. Ronnie James Dio:  He fronted and/or founded numerous groups including Elf, Rainbow, Black Sabbath, Dio, and Heaven & Hell.
i don't know