Band combining growls and clean vocals

Most of the time I listen to bands like this. Other than what's already been said:
Ihsahn
Enslaved
some Arcturus
Between the Buried and Me
Early Ulver
Cynic
Devin Townsend
Dimmu Borgir
Some Emperor
Gojira (sort of)
Negura Bunget
Swallow the Sun
 
depends on what project of mike's you're talking about. Bloodbath IMO I think he is better than Johan. In Opeth Mike's screams are amazing as well as the addition to singing but then when you compare it to Johan I think that Johan gets the point there.

I would say that Vikings are more metal than zombies and torture. Vikings are the living embodiment of heavy metal. The only thing more metal than vikings would be being tortured by zombie vikings. That's it; it doesn't get any more fucking metal than that.

And For The Stabwounds In Our Backs is about being killed by undead/zombie vikings, so that pretty much makes it the most metal song ever recorded.
 
I would say that Vikings are more metal than zombies and torture. Vikings are the living embodiment of heavy metal. The only thing more metal than vikings would be being tortured by zombie vikings. That's it; it doesn't get any more fucking metal than that.

And For The Stabwounds In Our Backs is about being killed by undead/zombie vikings, so that pretty much makes it the most metal song ever recorded.

Amon Amarth is like the ingrown hair on Opeths ballsack... are you even kidding me? Opeth's in a different league!