Band Members that Made Any Band the Best They Can Be

This is just a list, not a top ten. I'm not talking about the main members, I'm talking about the members that added a preverbial cherry on top when it comes to the very best of any band. It's okay if you have your own opinions.
The Top Ten
1 Freddie Mercury (Queen) Freddie Mercury (born Farrokh Bulsara, 5th September 1946 - 24th November 1991) was a Zanzibari-born British singer of Indian descent, songwriter and record producer, known as the lead vocalist and songwriter of the British rock band Queen. He also became known for his flamboyant stage persona and four-octave ...read more.
2 Roger Waters (Pink Floyd) George Roger Waters is an English singer, songwriter, multi-instrumentalist, and composer. He is mostly known for being the secondary lead vocalist and bassist of Pink Floyd.
3 Bill Ward (Black Sabbath) William Thomas "Bill" Ward is an English musician and visual artist, best known as the original drummer for the British heavy metal band Black Sabbath.
4 Adrian Smith (Iron Maiden) Adrian Frederick "H" Smith is an English guitarist, best known as a member of Iron Maiden, for whom he writes songs and performs live backing vocals on some tracks.
5 Criss Oliva (Savatage) Christopher "Criss" Michael Oliva was an American musician who was the lead guitarist and co-founder of the band Savatage.

Nice to see him on this list. I love his riffs and solos.

6 Marty Friedman (Megadeth) Martin Adam "Marty" Friedman is an American guitarist, known for his tenure as the lead guitarist for heavy metal band Megadeth which spanned nearly the full decade of the 1990s, as well as Cacophony alongside Jason Becker until 1989. Friedman has resided in Tokyo, Japan since 2003, where he has hosted ...read more.
7 Cliff Burton (Metallica) Clifford Lee "Cliff" Burton (February 10th 1962 - September 27th 1986) was an American musician, best known as the second bass guitarist for the American thrash metal band Metallica, recording three studio albums. ...read more.
8 Randy Rhoads (Ozzy Osbourne) Randall William "Randy" Rhoads was an American heavy metal guitarist who played with Ozzy Osbourne and Quiet Riot. He was killed in a plane crash.
9 David Lee Roth (Van Halen) David Lee Roth is an American rock vocalist, songwriter, actor, author, and former radio personality.
10 Dave Lombardo (Slayer) David "Dave" Lombardo is a Cuban American drummer, best known as a co-founding member of the American thrash metal band Slayer.
The Contenders
11 Chris Poland (Megadeth)
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