I’m not a fan of these lists either and agree that they can drive up (or keep up) prices.
However, I think you’re misunderstanding the purpose of the listing. It’s not making a value statement of Raymond being the best villager, but the most popular one—which he very unambiguously is. Yes, I think the high prices are for him are gross, and yes, it kinda pains me to see him get a tier to himself. But it is absolutely justified in terms of his popularity/desirability.
That said, I wouldn’t recommend giving him such a position. We all know he’s miles ahead of the others right now, so there’s no real reason to not just include him in the S Tier. Putting him on a pedestal like that will just cause his value to be more inflated than it already is.