Manowar produce two kinds of music: stuff that is objectively terrible but is so over the top and silly that it's still fun, or at least funny, and music that is crude and primitive but somehow is actually pretty fucking good, as well as being over-the-top (Such as the entire album Sign of the Hammer). Then there's some stuff that's just shit, but not all that much until Fighting the World.
Bal-Sagoth belong to the "music-is-really-over-the-top-but-frequently-fun-and-the-whole-thing-is-really-silly-but-ultimately-really-pretty-kickass" camp.