I think it's because the question is too hypothetical: I have no specific character in mind, which could have greatly narrowed the possible answers. I also could have put in more restraints for the answers, here's some possible narrowing edits I thought up of:
- Ask not to list how to get immunity from fear, and ask it in a separate question. Something along the lines of "I know you can get immunity from effects like spells, but I'm looking for straight bonuses to the rolls."
- Don't ask for how to get Advantage against fear. Advantage can't get me past 20.
- Ask only for abilities that allies can give me, and not features that only benefit self, making features like Mindless Rage and Stillness of Mind out-of-scope (sorry, Icyfire). This is because of the hypothetical-ness of the question, with only a platonic PC in mind, you'd need to rely on what your allies can give you instead of what you have for yourself (obviously a barbarian with mindless rage wouldn't have this problem!)
I really want this question reopened, as I can see it being a valuable resource for players to tap. Will any or all of the above edit proposals help my question? Any more ideas on how to get it reopened?