The best replacement for trivium is bullet for my valentine.

The best alternatives to trivium are rated as following:
★★★★★  bullet for my valentine
★★★  avenged sevenfold
★  dragonforce
★  lamb of god
  a7x
  as i lay dying
  shadows fall
  all that remains
  asking alexandria
  bfmv

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Speaking about trivium, one probably shouldn't forget about volbeat.

Other search terms related to trivium and their ratings are:
★★★★★ volbeat
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trivium
bullet for my valentine
avenged sevenfold