Re: Dimmu Borgir!
I think For All Tid is a classic of mid 90s black metal and their best. I enjoy their first few albums, especially Spiritual Black Dimensions and Puritanical Euphoric Misanthropia but unfortunately Dimmu has gotten really stale this past decade. Regarding guitarists, Astennu was hands-down the best guitarist this band ever had.
And I wouldn't really say that Old Man's Child was ever really any more straight-forward black metal than Dimmu because OMC is very death metal influenced and has never really, truly fit the black metal mold. I think Galder has always been more inspired more so by death and thrash metal than black metal, despite OMC being labelled as black metal. Born of the Flickering is by far, their best album in my opinion.