Mikael Akerfeldt -> I like his solos, but even so Mikael is NOT the world's best lead guitarist. He's not even in the top 10. I love his playing though, but he's mostly a rhythm guitarist and if you ask him he'll be the first one to admit it.
Kirk Hammett -> Only reason anyone thinks Kirk Hammett is the world's best is because he plays in Metallica. Metallica is (or at least used to be) an awesome band, but Hamster sucks as a solo guitarist. Hetfield, now there's someone who can play.
Dimebag Darrell -> Awesome guitar player, but again mostly known for his rhythm playing, although he did some great leads too. Not world's best.
Slash -> As far as being the world's best, seeing Slash on this list is a joke!
Joe Satriani -> He can definitely play! Among the world's top 10.
Yngwie Malmsteen -> I am not a fan, but he is among the world's top 5 for sure. No one can shred like Yngwie.
Devin Townsend -> Probably learned a lot from Vai, but no lead guitarist.
John Petrucci -> My vote for world's best goes to Petrucci. If you've ever seen him play you'll know why.
Peter Lingdren -> Probably not as technical of a lead guitarist as Mikael but still he plays a nice lead guitar.
Not on the list:
Carl August Tidemann -> Among the world's top 5, hands down.
Not on the list:
Steve Vai -> God of all things shred!