Speed: yngvie
Technicality/Craziness: buckethead or larry lalande
Songwriting: billie joe armstrong.
Originality: definately not jimmy page or jack white(see: plagerism; see also: original blues artists they ripped off). but i'd have to go with probably frank zappa.
Heavyness: angus young (sorry, gotta go old school...ac/dc are one of the bands that invented heavyness)
Slide: duane allman or maybe junior brown.
Blues: john lee hooker or srv.
Overall Best Guitarist: there is none.
okay...my post is done...goodbye.