Savern
Dr. Death in training
The musical elements that they use are more varied, but like I already stated, they use them in a really consistently similar fashion, so their songwriting as a whole is not particularly varied despite the incorporation of a wider variety of musical elements. This is extremely easy to understand and was already stated by me in a clear and concise fashion, yet you seem to have not understood.
Meh, agree to disagree. To me Opeth are one of the most varied bands around.