Top 10 Most Intelligent Metal Musicians

This list is based on my impressions while watching or reading interviews with metal musicians, as well as lyrics they wrote (if they are also lyricists), and other information, such as education degrees, books they wrote (if any).
The items in this list have been selected by the author of the list for you to vote and comment on.
The Top Ten
1 Mike Mangini Mike Mangini is an American drummer. Since 2010, he has been a member of progressive metal band Dream Theater, following the departure of founding drummer Mike Portnoy.
2 Steffen Kummerer Steffen Kummerer (born June 1, 1985) is a German guitarist, multi-instrumentalist, and producer. He is the leader, main songwriter, vocalist, and guitarist for the progressive technical death metal band Obscura as well as the blackened melodic death metal band Thulcandra.
3 Bruce Dickinson Paul Bruce Dickinson, known professionally as Bruce Dickinson, (born 7 August 1958) is an English musician, airline pilot, and broadcaster. He is most well known for being the lead singer in heavy metal band Iron Maiden and his solo career.Outside his career in music, Dickinson has pursued a number ...read more.
4 Dave Mustaine David Scott "Dave" Mustaine (born September 13, 1961) is an American musician, singer, songwriter, actor and author. Mustaine is best known as a pioneer in Thrash Metal, being the former lead guitarist of Metallica before his dismissal in 1983, leading to finding and becoming the front man of his own ...read more.
5 Ronnie James Dio Ronnie James Dio (born Ronald James Padavona; July 10, 1942 – May 16, 2010) was an American heavy metal singer, songwriter and musician. He fronted and/or founded numerous groups including Elf, Rainbow, Black Sabbath, Dio and Heaven & Hell. He is credited with popularizing the "metal horns" hand gesture ...read more.
6 Alex Skolnick Alexander Nathan Skolnick is an American metal and jazz guitarist who is the lead guitarist of the Bay Area thrash metal band Testament, and heads the jazz band Alex Skolnick Trio.
7 John Petrucci John Peter Petrucci is an American guitarist, composer and producer. He is best known as a founding member of the progressive metal band Dream Theater. Compared to his level of skill, John Petrucci is relatively unknown in the modern music industry.
8 Nergal Adam Nergal Darski (born Adam Michał Darski; 10 June 1977 in Gdynia), is a Polish musician and television personality, best known for being the frontman for the black/death metal band Behemoth. ...read more.
9 Tobias Sammet Tobias Sammet is a German metal musician, best known as the vocalist and primary songwriter of the power metal band Edguy, as well as the founder, main singer and bassist of the metal opera Avantasia.
10 Tim Charles