I'm more of a Metal guy myself! from progressive like Dream Theater to Haggard or Opeth! xd
Rock
The Smashing Pumpkins (Alternative/Psycadelic/Punk Rock)
Pink Floyd (enought said)
Led Zepplin (Hard Rock, fathers of metal)
Ayreon (Prog, Folk Metal/Rock)
The Beatles (Pop Rock)
Dave Matthews Band (Awesome Rock xd)
Dazkarieh (Folk Rock)
Devin Townsend (this guy is just crazy! but something he does can be considered rock)
Mostly Autumn (just Rock with a little folk influence)
Ornatos Violeta (Portuguese band)
Stream Of Passion (Goth Rock)
TransAtlantic (Prog Rock - Super Group) Must listen to these guys... but you must have at least 30min to enjoy a single song!
But here you have an awesome song of just 6 minutes
(my first youtube posting. hope it's ok)