Alphons
National Beholder
A lot of people seem to have taken issue with the "Can't join the Enclave" aspect, but honestly I think that's probably one of the things the mod did right:
Absolutely not the right way.
Courier can talk with an Enclave member who invites them to join, but Courier's only response "Why would I want to join the fascist paramilitary organization". Nothing about being mutant or being aware of their past attempts at destroying humanity. Just some cheesy one liner.