The Pharmacist.
I would recommend also members, who are not too often participants in signature campaigns to avoid conflicts of interest (although there are many honorable members, who are also active in signature campaigns.).
i dont think being a regular participant in sig campaigns would lead to a conflict of interest in the context of leaving reliable ratings; DT members just leave ratings as part of their contribution to the forum, this doesn't at all tie into just making some pocket change off of posting regularly.
Let me just say this: I have tagged some particularly egregious shitposters, and I have seen them come back and apply for campaigns that I've applied to. It is not my intention to neg them as a means of securing myself a spot in any campaign--and most of the time, they're newbies who wouldn't be competing for Hero+ spots anyway. I'm aware that it could look like there's a conflict of interest, but every neg that I've left was not left with the thought that I would be on DT2 someday and would gain from it personally. They were all left with good intentions, so to speak.
I saw members accusing competitors without evidence in the past. But didn't see you giving negative feedback to yours, so I also think, that you are a good choice for default trust.