i would say pantera, but thats just my opinion. What is yours? post a sentence why you like the band that you chose, otherwise this will be considered spam and get locked...
oops, sorry for double post, but i don't want mine to be considered spam or locked, so I'll add on a sentence: They have my either 2nd or favorite drummer, I love Johnny's bass, and Sinister Gates is pretty good.
Megadeth, the trash legend that spawned from Metallica when Dave Mustaine got kicked from the band. At this time I must say that Megadeth has surpassed Metallica by a long shot (which means that the band must be awesome)