how about:
Ram-Zet
Dominion reunion (the Michelle Richfield one)
Dismal Euphony
Bal-Sagoth
Mezarkabul (did someone say them already? oh well, I can't remember)
Xentrix
Scanner
Veni Domine
or, perhaps a Stratovarius set, where they only play the darker stuff from the first three albums? (I suppose I'd be the only one in the audience going apeshit to hear "The Hills Have Eyes" or "Dreamspace".
)