The best replacement for screamo is metalcore.

The best alternatives to screamo are rated as following:
★★★★★  metalcore
★★★★  death metal
★★★★  emo
★★★  heavy metal
★  black metal
  fake screamo

Your alternative for screamo is not listed? Suggest!
Speaking about screamo, one probably shouldn't forget about techno bands.

Other search terms related to screamo and their ratings are:
★★★★★ techno bands
You have in mind a companion for screamo and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of screamo in all years. Click on graph for more.
screamo
metalcore
death metal