my favorites are:

metallica
crane
rhapsody
AFI
children of bodom
sepultura
in flames
anti flag
closer than kin
evergreen terrace
fear factory
finch
blind guardian
give up the gost
goldfinger
hatebreed
kermess
la botine souriante
les charbonniers de l'enfer
les cowboys fringants
most precious blood
mustard plug
no use for a name
oversight
paul piché
poison the well
raised fist
shadow's fall
slayer
soilwork
soulfly
tex lecor

***Some of them are Quebec (Canada) bands so it's very possible that you didn't hear about them before. If you understand French I suggest you to listen to D-Natural too. It's kind of rap from quebec VERY VERY funny! It's sucks so much that I find that funny! I attached a song of him if you want to listen to it.