I dont think this is a good solution. It will have many of the same pitfalls as the current trust system has.
+1 , picking someone randomly from that list or all is not at all good solution. Then I guess user should use default trust in these case.
How realistic is it for us to ask someone who spends just a couple hours here every week browsing through the marketplace to create a fully customized trust list?
There must be another, better solution
Its called use another forum/ subreddit. If you don't like it. no one is forcing you to stay here
OP is asking for better solution and showed no intention of leaving this forum.