The best replacement for volturi is death eaters.

The best alternatives to volturi are rated as following:
★★★★★  death eaters
★★★★  voldemort
★★★  originals
★★★  cullens breaking dawn
★★  akatsuki
★★  cullen
★★  edward alice cullen
★  edward and alice cullen
★  cullens

Your alternative for volturi is not listed? Suggest!
Speaking about volturi, one probably shouldn't forget about carlisle.

Other search terms related to volturi and their ratings are:
★★★★★ carlisle
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volturi
death eaters
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