Recently finished the Forerunner trilogy of books and have been in a Halo mood, so I went back and thought about fine-tuning some of my older Forerunner stuff until I realized I only had one and it wasn't that great. Just a note, I do consider the Prometheans a separate thing here so I'm referring to the original Forerunner Prometheans. Anyway, I looked at some of the rates and did the ones that didn't confuse me, so unfortunately no Lifeworkers or Librarian here.

Builder
Miner
Warrior-Servant
Promethean