Someone with a provable, undeniable, zero stakes in the outcome of publishing said algorithm, while being of such moral fortitude as to be un-corruptable. IMO, if you find such a person, you’re probably better off just putting them in charge.

Best bet is to raise the bar on any coordinated attempt to sabotage things. Multiple algorithms must be made by distinct parties, and the submissions compared against one another, and somehow averaged out (e.g. multiple running algorithms that vote amongst themselves) so that the only way to game the system is a very large and unlikely conspiracy.