@Aaron Bergman says
I wish there was (and there should be) more discussion of “which singular organization is most deserving of money rn” Individual donors should make their best guess public and indicate openness to critique
So let's guess. What is your suggestion?
In the AI governance space (specifically research; I'm not familiar with advocacy), I think GovAI and RP's AI Governance & Strategy [edit: now IAPS] team convert marginal money into research very well. I think this mostly because I like their teams and track records and (last I checked) they say they want to hire more but are funding-constrained.
But I wouldn't be surprised if some alignment or advocacy thing is predictably better.