Jeremy Puckett of Blackwing Productions really championed the Fantasy Heroic hack in the Cortex Plus Hacker’s Guide by releasing two supplements with additional monsters, classes, mechanics, and more. In fact, he pioneered licensing out the Cortex system, which turned into the Cortex Creator Studio Program on DriveThruRPG.
Here’s a PDF that organizes all of the monsters in both the Cortex Plus Hacker’s Guide and Fantasy Roleplaying: An Omnibus of Opponents for easy reference when building your own encounters and scenarios.
Cortex Plus Monster Index – PDF via Google Docs.