Devin Townsend (progressive metal)
Pain of Salvation (progressive metal)
Kamelot (power metal)
Seventh Wonder (progressive metal)
Between the Buried and Me (progressive metalcore)
Insomnium (melodic death metal)
Lunatic Soul (oriental experimental progressive rock stuff)
Opeth (progressive death metal)
Kauan (post-rock)
Anathema (progressive rock)
I like progressive.

Pain of Salvation
Alter Bridge
Foo Fighters
Dev & his projects
HIM
Textures
Deftones
Anathema
Opeth
A Perfect Circle

Pretty much my lastfm top 10:

Devin
Meshuggah
Dream Theater
Opeth
Mastodon
Jethro Tull
Porcupine Tree
Suffocation
Amon Amarth
Arjen Lucassen's...

ulver
darkthrone
anathema
massive attack
ihsahn
urfaust
deathspell omega
deftones
dev
immortal
enslaved

theres too many of them

Hard, but I put my list together (in no particular order):

Dev
Opeth
Steven Wilson (all projects, including Porcupine Tree)
Ulver
The Mars Volta
Meshuggah
Shining
Dream Theater
Gojira
Ihsahn

Deathspell Omega and The Dillinger Escape Plan get an honorable mention.

Opeth
The Birthday Massacre
Rammstein
Deftones
Ef
Ulver
Lacuna Coil
Meshuggah
Turmion Kaitlot
And of course, Dev.