"Rank" and "reputation" are different, even you're a legendary, it doesn't mean you're reputable. A newbie account can be more reputable than a legendary because reputation built by trust, trust mostly come from money.
If you want to gain reputation, technically, you need to give your money.
Here are two example
Best_Change and
eXch, they don't have to be active, but they have a long term campaign.
You're confusing trust as social term and trust as forum indicator. I use the word "trust" as social term.
Forum indicators don't make any sense to me. What if some legendary user knows you for a long time and can personally vouch for you? What if someone gave you a point for a confirmed transaction? They both can give you +1 trust, but, of course, the amount of actual,
social trust (the only trust that matters), they put into you is different. Forum indicators can't reflect it.