Ronnie James Dio was an iconic American heavy metal singer known for his work with bands such as Rainbow, Black Sabbath, and his own band, Dio. He popularized the 'devil horns' hand gesture in metal culture and was highly regarded for his powerful vocal range.
This is based on winning 3 head-to-head matchups with other famous people, but also losing 25 head-to-head matchups.
Most recently Ronnie James Dio lost a matchup to Jennifer Hudson (#1409) voted by someone from United Kingdom.