There people who know who J5 and Binary Star are? I am fucking SHOCKED.

Probably my favourites besides those two are:
Won-by-One(Collab stuff)
Sweatshop Union/Kyprios
Abdominal
Dead Celebrity Status
Hed P.E.
K-os (fairly mainstream I guess...)
Matisyahu

And as said before Swollen members, but it doesn't really count as it is pretty much as close to mainstream hip-hop Canada will ever come.