I am nominating @Majavah for +2 rights in mediawiki/. Not so recently they started working on the CentralAuth extension, which can always use more love. They're also active in remediating train blockers (and even created train-blockers.toolforge.org/ !). I hope we can see more code reviews from them in the future.
I don't believe there's any question on whether they're trusted. Majavah has Toolforge root powers, and helps keep the Beta Cluster afloat. And is just generally helpful all around.